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Professional-Cloud-Network-Engineer Google Cloud Certified - Professional Cloud Network Engineer Questions and Answers

Questions 4

You need to restrict access to your Google Cloud load-balanced application so that only specific IP addresses can connect.

What should you do?

Options:

A.

Create a secure perimeter using the Access Context Manager feature of VPC Service Controls and restrict access to the source IP range of the allowed clients and Google health check IP ranges.

B.

Create a secure perimeter using VPC Service Controls, and mark the load balancer as a service restricted to the source IP range of the allowed clients and Google health check IP ranges.

C.

Tag the backend instances "application," and create a firewall rule with target tag "application" and the source IP range of the allowed clients and Google health check IP ranges.

D.

Label the backend instances "application," and create a firewall rule with the target label "application" and the source IP range of the allowed clients and Google health check IP ranges.

Questions 5

Your company has a single Virtual Private Cloud (VPC) network deployed in Google Cloud with access from your on-premises network using Cloud Interconnect. You must configure access only to Google APIs and services that are supported by VPC Service Controls through hybrid connectivity with a service level agreement (SLA) in place. What should you do?

Options:

A.

Configure the existing Cloud Routers to advertise the Google API's public virtual IP addresses.

B.

Use Private Google Access for on-premises hosts with restricted.googleapis.com virtual IP addresses.

C.

Configure the existing Cloud Routers to advertise a default route, and use Cloud NAT to translate traffic from your on-premises network.

D.

Add Direct Peering links, and use them for connectivity to Google APIs that use public virtual IP addresses.

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Questions 6

Question:

You are configuring the firewall endpoints as part of the Cloud Next Generation Firewall (Cloud NGFW) intrusion prevention service in Google Cloud. You have configured a threat prevention security profile, and you now need to create an endpoint for traffic inspection. What should you do?

Options:

A.

Attach the profile to the VPC network, create a firewall endpoint within the zone, and use a firewall policy rule to apply the L7 inspection.

B.

Create a firewall endpoint within the zone, associate the endpoint to the VPC network, and use a firewall policy rule to apply the L7 inspection.

C.

Create a firewall endpoint within the region, associate the endpoint to the VPC network, and use a firewall policy rule to apply the L7 inspection.

D.

Create a Private Service Connect endpoint within the zone, associate the endpoint to the VPC network, and use a firewall policy rule to apply the L7 inspection.

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Questions 7

Your on-premises data center has 2 routers connected to your Google Cloud environment through a VPN on each router. All applications are working correctly; however, all of the traffic is passing across a single VPN instead of being load-balanced across the 2 connections as desired.

During troubleshooting you find:

• Each on-premises router is configured with a unique ASN.

• Each on-premises router is configured with the same routes and priorities.

• Both on-premises routers are configured with a VPN connected to a single Cloud Router.

• BGP sessions are established between both on-premises routers and the Cloud Router.

• Only 1 of the on-premises router’s routes are being added to the routing table.

What is the most likely cause of this problem?

Options:

A.

The on-premises routers are configured with the same routes.

B.

A firewall is blocking the traffic across the second VPN connection.

C.

You do not have a load balancer to load-balance the network traffic.

D.

The ASNs being used on the on-premises routers are different.

Questions 8

Your company has provisioned 2000 virtual machines (VMs) in the private subnet of your Virtual Private Cloud (VPC) in the us-east1 region. You need to configure each VM to have a minimum of 128 TCP connections to a public repository so that users can download software updates and packages over the internet. You need to implement a Cloud NAT gateway so that the VMs are able to perform outbound NAT to the internet. You must ensure that all VMs can simultaneously connect to the public repository and download software updates and packages. Which two methods can you use to accomplish this? (Choose two.)

Options:

A.

Configure the NAT gateway in manual allocation mode, allocate 2 NAT IP addresses, and update the minimum number of ports per VM to 256.

B.

Create a second Cloud NAT gateway with the default minimum number of ports configured per VM to 64.

C.

Use the default Cloud NAT gateway's NAT proxy to dynamically scale using a single NAT IP address.

D.

Use the default Cloud NAT gateway to automatically scale to the required number of NAT IP addresses, and update the minimum number of ports per VM to 128.

E.

Configure the NAT gateway in manual allocation mode, allocate 4 NAT IP addresses, and update the minimum number of ports per VM to 128.

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Questions 9

You have recently been put in charge of managing identity and access management for your organization. You have several projects and want to use scripting and automation wherever possible. You want to grant the editor role to a project member.

Which two methods can you use to accomplish this? (Choose two.)

Options:

A.

GetIamPolicy() via REST API

B.

setIamPolicy() via REST API

C.

gcloud pubsub add-iam-policy-binding Sprojectname --member user:Susername --role roles/editor

D.

gcloud projects add-iam-policy-binding Sprojectname --member user:Susername --role roles/editor

E.

Enter an email address in the Add members field, and select the desired role from the drop-down menu in the GCP Console.

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Questions 10

Question:

You are designing the architecture for your organization so that clients can connect to certain Google APIs. Your plan must include a way to connect to Cloud Storage and BigQuery. You also need to ensure the traffic does not traverse the internet. You want your solution to be cloud-first and require the least amount of configuration steps. What should you do?

Options:

A.

Configure Private Google Access on the VPC resource. Create a default route to the internet.

B.

Configure Private Google Access on the subnet resource. Create a default route to the internet.

C.

Configure Cloud NAT and remove the default route to the internet.

D.

Configure a global Secure Web Proxy and remove the default route to the internet.

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Questions 11

You have configured a service on Google Cloud that connects to an on-premises service via a Dedicated Interconnect. Users are reporting recent connectivity issues. You need to determine whether the traffic is being dropped because of firewall rules or a routing decision. What should you do?

Options:

A.

Use the Network Intelligence Center Connectivity Tests to test the connectivity between the VPC and the on-premises network.

B.

Use Network Intelligence Center Network Topology to check the traffic flow, and replay the traffic from the time period when the connectivity issue occurred.

C.

Configure VPC Flow Logs. Review the logs by filtering on the source and destination.

D.

Configure a Compute Engine instance on the same VPC as the service running on Google Cloud to run a traceroute targeted at the on-premises service.

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Questions 12

Your company's logo is published as an image file across multiple websites that are hosted by your company You have implemented Cloud CDN, however, you want to improve the performance of the cache hit ratio associated with this image file. What should you do?

Options:

A.

Configure custom cache keys for the backend service that holds the image file, and clear the Host and Protocol checkboxes-

B.

Configure Cloud Storage as a custom origin backend to host the image file, and select multi-region as the location type

C.

Configure versioned IJRLs for each domain to serve users the •mage file before the cache entry expires

D.

Configure the default time to live (TTL) as O for the image file.

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Questions 13

You have deployed a new internal application that provides HTTP and TFTP services to on-premises hosts. You want to be able to distribute traffic across multiple Compute Engine instances, but need to ensure that clients are sticky to a particular instance across both services.

Which session affinity should you choose?

Options:

A.

None

B.

Client IP

C.

Client IP and protocol

D.

Client IP, port and protocol

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Questions 14

You have just deployed your infrastructure on Google Cloud. You now need to configure the DNS to meet the following requirements:

Your on-premises resources should resolve your Google Cloud zones.

Your Google Cloud resources should resolve your on-premises zones.

You need the ability to resolve “. internal” zones provisioned by Google Cloud.

What should you do?

Options:

A.

Configure an outbound server policy, and set your alternative name server to be your on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google's public DNS 8.8.8.8.

B.

Configure both an inbound server policy and outbound DNS forwarding zones with the target as the on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google Cloud's DNS resolver.

C.

Configure an outbound DNS server policy, and set your alternative name server to be your on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google Cloud's DNS resolver.

D.

Configure Cloud DNS to DNS peer with your on-premises DNS resolver. Configure your on-premises DNS resolver to forward Google Cloud zone queries to Google's public DNS 8.8.8.8.

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Questions 15

You want to deploy a VPN Gateway to connect your on-premises network to GCP. You are using a non BGP-capable on-premises VPN device. You want to minimize downtime and operational overhead when your network grows. The device supports only IKEv2, and you want to follow Google-recommended practices.

What should you do?

Options:

A.

• Create a Cloud VPN instance.• Create a policy-based VPN tunnel per subnet.• Configure the appropriate local and remote traffic selectors to match your local and remote networks.• Create the appropriate static routes.

B.

• Create a Cloud VPN instance.• Create a policy-based VPN tunnel.• Configure the appropriate local and remote traffic selectors to match your local and remote networks.• Configure the appropriate static routes.

C.

• Create a Cloud VPN instance.• Create a route-based VPN tunnel.• Configure the appropriate local and remote traffic selectors to match your local and remote networks.• Configure the appropriate static routes.

D.

• Create a Cloud VPN instance.• Create a route-based VPN tunnel.• Configure the appropriate local and remote traffic selectors to 0.0.0.0/0.• Configure the appropriate static routes.

Questions 16

You recently deployed Cloud VPN to connect your on-premises data canter to Google Cloud. You need to monitor the usage of this VPN and set up alerts in case traffic exceeds the maximum allowed. You need to be able to quickly decide whether to add extra links or move to a Dedicated Interconnect. What should you do?

Options:

A.

In the Network Intelligence Canter, check for the number of packet drops on the VPN.

B.

In the Google Cloud Console, use Monitoring Query Language to create a custom alert for bandwidth utilization.

C.

In the Monitoring section of the Google Cloud Console, use the Dashboard section to select a default dashboard for VPN usage.

D.

In the VPN section of the Google Cloud Console, select the VPN under hybrid connectivity, and then select monitoring to display utilization on the dashboard.

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Questions 17

Question:

You reviewed the user behavior for your main application, which uses an external global Application Load Balancer, and found that the backend servers were overloaded due to erratic spikes in client requests. You need to limit concurrent sessions and return an HTTP 429 "Too Many Requests" response back to the client while following Google-recommended practices. What should you do?

Options:

A.

Create a Cloud Armor security policy, and apply the predefined Open Worldwide Application Security Project (OWASP) rules to automatically implement the rate limit per client IP address.

B.

Configure the load balancer to accept only the defined amount of requests per client IP address, increase the backend servers to support more traffic, and redirect traffic to a different backend to burst traffic.

C.

Configure a VM with Linux, implement the rate limit through iptables, and use a firewall rule to send an HTTP 429 response to the client application.

D.

Create a Cloud Armor security policy, and associate the policy with the load balancer. Configure the security policy's settings as follows: action: throttle, conform-action: allow, exceed-action: deny-429.

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Questions 18

Your software team is developing an on-premises web application that requires direct connectivity to Compute Engine Instances in GCP using the RFC 1918 address space. You want to choose a connectivity solution from your on-premises environment to GCP, given these specifications:

    Your ISP is a Google Partner Interconnect provider.

    Your on-premises VPN device’s internet uplink and downlink speeds are 10 Gbps.

    A test VPN connection between your on-premises gateway and GCP is performing at a maximum speed of 500 Mbps due to packet losses.

    Most of the data transfer will be from GCP to the on-premises environment.

    The application can burst up to 1.5 Gbps during peak transfers over the Interconnect.

    Cost and the complexity of the solution should be minimal.

How should you provision the connectivity solution?

Options:

A.

Provision a Partner Interconnect through your ISP.

B.

Provision a Dedicated Interconnect instead of a VPN.

C.

Create multiple VPN tunnels to account for the packet losses, and increase bandwidth using ECMP.

D.

Use network compression over your VPN to increase the amount of data you can send over your VPN.

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Questions 19

You have the following routing design. You discover that Compute Engine instances in Subnet-2 in the asia-southeast1 region cannot communicate with compute resources on-premises. What should you do?

Options:

A.

Configure a custom route advertisement on the Cloud Router.

B.

Enable IP forwarding in the asia-southeast1 region.

C.

Change the VPC dynamic routing mode to Global.

D.

Add a second Border Gateway Protocol (BGP) session to the Cloud Router.

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Questions 20

(Your digital media company stores a large number of video files on-premises. Each video file ranges from 100 MB to 100 GB. You are currently storing 150 TB of video data in your on-premises network, with no room for expansion. You need to migrate all infrequently accessed video files older than one year to Cloud Storage to ensure that on-premises storage remains available for new files. You must also minimize costs and control bandwidth usage. What should you do?)

Options:

A.

Create a Cloud Storage bucket. Establish an Identity and Access Management (IAM) role with write permissions to the bucket. Use the gsutil tool to directly copy files over the network to Cloud Storage.

B.

Set up a Cloud Interconnect connection between the on-premises network and Google Cloud. Establish a private endpoint for Filestore access. Transfer the data from the existing Network File System (NFS) to Filestore.

C.

Use Transfer Appliance to request an appliance. Load the data locally, and ship the appliance back to Google for ingestion into Cloud Storage.

D.

Use Storage Transfer Service to move the data from the selected on-premises file storage systems to a Cloud Storage bucket.

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Questions 21

You recently configured Google Cloud Armor security policies to manage traffic to your application. You discover that Google Cloud Armor is incorrectly blocking some traffic to your application. You need to identity the web application firewall (WAF) rule that is incorrectly blocking traffic. What should you do?

Options:

A.

Enable firewall logs, and view the logs in Firewall Insights.

B.

Enable HTTP(S) Load Balancing logging with sampling rate equal to 1, and view the logs in Cloud Logging.

C.

Enable VPC Flow Logs, and view the logs in Cloud Logging.

D.

Enable Google Cloud Armor audit logs, and view the logs on the Activity page in the Google Cloud Console.

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Questions 22

You are troubleshooting connectivity issues between Google Cloud and a public SaaS provider. Connectivity between the two environments is through the public internet. Your users are reporting intermittent connection errors when using TCP to connect; however, ICMP tests show no failures. According to users, errors occur around the same time every day. You want to troubleshoot and gather information by using Google Cloud tools that are most likely to provide insights into what is occurring within Google Cloud. What should you do?

Options:

A.

Enable the Firewall Insights API. Set the deny rule insights observation period to one day. Review the insights to assure there are no firewall rules denying traffic.

B.

Enable and review Cloud Logging on your Cloud NAT gateway. Look for logs with errors matching the destination IP address of the public SaaS provider.

C.

Create a Connectivity Test by using TCP, the source IP address of your test VM, and the destination IP address of the public SaaS provider. Review the live data plane analysis and take the next steps based on the test results.

D.

Enable and review Cloud Logging for Cloud Armor. Look for logs with errors matching the destination IP address of the public SaaS provider.

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Questions 23

You have several microservices running in a private subnet in an existing Virtual Private Cloud (VPC). You need to create additional serverless services that use Cloud Run and Cloud Functions to access the microservices. The network traffic volume between your serverless services and private microservices is low. However, each serverless service must be able to communicate with any of your microservices. You want to implement a solution that minimizes cost. What should you do?

Options:

A.

Deploy your serverless services to the serverless VPC. Peer the serverless service VPC to the existing VPC. Configure firewall rules to allow traffic between the serverless services and your existing microservices.

B.

Create a serverless VPC access connector for each serverless service. Configure the connectors to allow traffic between the serverless services and your existing microservices.

C.

Deploy your serverless services to the existing VPC. Configure firewall rules to allow traffic between the serverless services and your existing microservices.

D.

Create a serverless VPC access connector. Configure the serverless service to use the connector for communication to the microservices.

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Questions 24

You are designing a shared VPC architecture. Your network and security team has strict controls over which routes are exposed between departments. Your Production and Staging departments can communicate with each other, but only via specific networks. You want to follow Google-recommended practices.

How should you design this topology?

Options:

A.

Create 2 shared VPCs within the shared VPC Host Project, and enable VPC peering between them. Use firewall rules to filter access between the specific networks.

B.

Create 2 shared VPCs within the shared VPC Host Project, and create a Cloud VPN/Cloud Router between them. Use Flexible Route Advertisement (FRA) to filter access between the specific networks.

C.

Create 2 shared VPCs within the shared VPC Service Project, and create a Cloud VPN/Cloud Router between them. Use Flexible Route Advertisement (FRA) to filter access between the specific networks.

D.

Create 1 VPC within the shared VPC Host Project, and share individual subnets with the Service Projects to filter access between the specific networks.

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Questions 25

You are designing a Partner Interconnect hybrid cloud connectivity solution with geo-redundancy across two metropolitan areas. You want to follow Google-recommended practices to set up the following region/metro pairs:

(region 1/metro 1)

(region 2/metro 2)

What should you do?

Options:

A.

Create a Cloud Router in region 1 with two VLAN attachments connected to metro1-zone1-x.

Create a Cloud Router in region 2 with two VLAN attachments connected to metro1-zone2-x.

B.

Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x.

Create a Cloud Router in region 2 with two VLAN attachments connected to metro2-zone2-x.

C.

Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone2-x.

Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone2-x.

D.

Create a Cloud Router in region 1 with one VLAN attachment connected to metro1-zone1-x and one VLAN attachment connected to metro1-zone2-x.

Create a Cloud Router in region 2 with one VLAN attachment connected to metro2-zone1-x and one VLAN attachment to metro2-zone2-x.

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Questions 26

You have a storage bucket that contains two objects. Cloud CDN is enabled on the bucket, and both objects have been successfully cached. Now you want to make sure that one of the two objects will not be cached anymore, and will always be served to the internet directly from the origin.

What should you do?

Options:

A.

Ensure that the object you don’t want to be cached anymore is not shared publicly.

B.

Create a new storage bucket, and move the object you don’t want to be checked anymore inside it. Then edit the bucket setting and enable the private attribute.

C.

Add an appropriate lifecycle rule on the storage bucket containing the two objects.

D.

Add a Cache-Control entry with value private to the metadata of the object you don’t want to be cached anymore. Invalidate all the previously cached copies.

Questions 27

Your team is developing an application that will be used by consumers all over the world. Currently, the application sits behind a global external application load balancer You need to protect the application from potential application-level attacks. What should you do?

Options:

A.

Enable Cloud CDN on the backend service.

B.

Create multiple firewall deny rules to block malicious users, and apply them to the global external application load balancer

C.

Create a Google Cloud Armor security policy with web application firewall rules, and apply the security policy to the backend service.

D.

Create a VPC Service Controls perimeter with the global external application load balancer as the protected service, and apply it to the backend service

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Questions 28

You deployed a hub-and-spoke architecture in your Google Cloud environment that uses VPC Network Peering to connect the spokes to the hub. For security reasons, you deployed a private Google Kubernetes Engine (GKE) cluster in one of the spoke projects with a private endpoint for the control plane. You configured authorized networks to be the subnet range where the GKE nodes are deployed. When you attempt to reach the GKE control plane from a different spoke project, you cannot access it. You need to allow access to the GKE control plane from the other spoke projects. What should you do?

Options:

A.

Add a firewall rule that allows port 443 from the other spoke projects.

B.

Enable Private Google Access on the subnet where the GKE nodes are deployed.

C.

Configure the authorized networks to be the subnet ranges of the other spoke projects.

D.

Deploy a proxy in the spoke project where the GKE nodes are deployed and connect to the control plane through the proxy.

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Questions 29

Your organization has a Google Cloud Virtual Private Cloud (VPC) with subnets in us-east1, us-west4, and europe-west4 that use the default VPC configuration. Employees in a branch office in Europe need to access the resources in the VPC using HA VPN. You configured the HA VPN associated with the Google Cloud VPC for your organization with a Cloud Router deployed in europe-west4. You need to ensure that the users in the branch office can quickly and easily access all resources in the VPC. What should you do?

Options:

A.

Create custom advertised routes for each subnet.

B.

Configure each subnet’s VPN connections to use Cloud VPN to connect to the branch office.

C.

Configure the VPC dynamic routing mode to Global.

D.

Set the advertised routes to Global for the Cloud Router.

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Questions 30

Your company’s Google Cloud-deployed, streaming application supports multiple languages. The application development team has asked you how they should support splitting audio and video traffic to different backend Google Cloud storage buckets. They want to use URL maps and minimize operational overhead. They are currently using the following directory structure:

/fr/video

/en/video

/es/video

/../video

/fr/audio

/en/audio

/es/audio

/../audio

Which solution should you recommend?

Options:

A.

Rearrange the directory structure, create a URL map and leverage a path rule such as /video/* and /audio/*.

B.

Rearrange the directory structure, create DNS hostname entries for video and audio and leverage a path rule such as /video/* and /audio/*.

C.

Leave the directory structure as-is, create a URL map and leverage a path rule such as \/[a-z]{2}\/video and

\/[a-z]{2}\/audio.

D.

Leave the directory structure as-is, create a URL map and leverage a path rule such as /*/video and /*/ audio.

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Questions 31

You work for a university that is migrating to Google Cloud.

These are the cloud requirements:

On-premises connectivity with 10 Gbps

Lowest latency access to the cloud

Centralized Networking Administration Team

New departments are asking for on-premises connectivity to their projects. You want to deploy the most cost-efficient interconnect solution for connecting the campus to Google Cloud.

What should you do?

Options:

A.

Use Shared VPC, and deploy the VLAN attachments and Dedicated Interconnect in the host project.

B.

Use Shared VPC, and deploy the VLAN attachments in the service projects. Connect the VLAN attachment to the Shared VPC's host project.

C.

Use standalone projects, and deploy the VLAN attachments in the individual projects. Connect the VLAN attachment to the standalone projects' Dedicated Interconnects.

D.

Use standalone projects and deploy the VLAN attachments and Dedicated Interconnects in each of the individual projects.

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Questions 32

You are troubleshooting an application in your organization's Google Cloud network that is not functioning as expected. You suspect that packets are getting lost somewhere. The application sends packets intermittently at a low volume from a Compute Engine VM to a destination on your on-premises network through a pair of Cloud Interconnect VLAN attachments. You validated that the Cloud Next Generation Firewall (Cloud NGFW) rules do not have any deny statements blocking egress traffic, and you do not have any explicit allow rules. Following Google-recommended practices, you need to analyze the flow to see if packets are being sent correctly out of the VM to isolate the issue. What should you do?

Options:

A.

Create a packet mirroring policy that is configured with your VM as the source and destined to a collector. Analyze the packet captures.

B.

Enable VPC Flow Logs on the subnet that the VM is deployed in with sample_rate = 1.0, and run a query in Logs Explorer to analyze the packet flow.

C.

Enable Firewall Rules Logging on your firewall rules and review the logs.

D.

Verify the network/attachment/egress_dropped_packet.s_count Cloud Interconnect VLAN attachment metric.

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Questions 33

You need to configure a static route to an on-premises resource behind a Cloud VPN gateway that is configured for policy-based routing using the gcloud command.

Which next hop should you choose?

Options:

A.

The default internet gateway

B.

The IP address of the Cloud VPN gateway

C.

The name and region of the Cloud VPN tunnel

D.

The IP address of the instance on the remote side of the VPN tunnel

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Questions 34

You are deploying a global external TCP load balancing solution and want to preserve the source IP address of the original layer 3 payload.

Which type of load balancer should you use?

Options:

A.

HTTP(S) load balancer

B.

Network load balancer

C.

Internal load balancer

D.

TCP/SSL proxy load balancer

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Questions 35

Question:

You are troubleshooting connectivity issues between Google Cloud and a public SaaS provider. Connectivity between the two environments is through the public internet. Your users are reporting intermittent connection errors when using TCP to connect; however, ICMP tests show no failures. According to users, errors occur around the same time every day. You want to troubleshoot and gather information by using Google Cloud tools that are most likely to provide insights into what is occurring within Google Cloud. What should you do?

Options:

A.

Create a Connectivity Test by using TCP, the source IP address of your test VM, and the destination IP address of the public SaaS provider. Review the live data plane analysis and take the next steps based on the test results.

B.

Enable and review Cloud Logging on your Cloud NAT gateway. Look for logs with errors matching the destination IP address of the public SaaS provider.

C.

Enable the Firewall insights API. Set the deny rule insights observation period to one day. Review the insights to assure there are no firewall rules denying traffic.

D.

Enable and review Cloud Logging for Cloud Armor. Look for logs with errors matching the destination IP address of the public SaaS provider.

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Questions 36

Question:

Your organization has approximately 100 teams that need to manage their own environments. A central team must manage the network. You need to design a landing zone that provides separate projects for each team and ensure the solution can scale. What should you do?

Options:

A.

Configure VPC Network Peering and peer one of the VPCs to the service project.

B.

Configure Policy-based Routing for each team.

C.

Configure a Shared VPC and create a VPC network in the host project.

D.

Configure a Shared VPC, and create a VPC network in the service project.

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Questions 37

You want to implement an IPSec tunnel between your on-premises network and a VPC via Cloud VPN. You need to restrict reachability over the tunnel to specific local subnets, and you do not have a device capable of speaking Border Gateway Protocol (BGP).

Which routing option should you choose?

Options:

A.

Dynamic routing using Cloud Router

B.

Route-based routing using default traffic selectors

C.

Policy-based routing using a custom local traffic selector

D.

Policy-based routing using the default local traffic selector

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Questions 38

You have the networking configuration shown. In the diagram Two VLAN attachments associated With two Dedicated Interconnect connections terminate on the same Cloud Router (mycloudrouter). The Interconnect connections terminate on two separate on-premises routers. You advertise the same prefixes from the Border Gateway Protocol (BOP) sessions associated with each Of the VLAN attachments.

You notice an asymmetric traffic flow between the two Interconnect connections. Which of the following actions should you take to troubleshoot the asymmetric traffic flow?

Options:

A.

From the Google Cloud console, navigate to the Hybrid Connectivity select the Cloud Router, and view BGP sessions.

B.

From the Cloud CLI, run gcloud compute –protect_ID router get—status mycloudrouter —-region REGION and review the results.

C.

From the Google Cloud console, navigate to Cloud Logging to view VPC Flow Logs and review the results

D.

From the Cloud CLI. run gcloud compute routers describe mycloudrouter

--region REGION and review the results

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Questions 39

Your company's current network architecture has two VPCs that are connected by a dual-NIC instance that acts as a bump-in-the-wire firewall between the two VPCs. Flows between pairs of subnets across the two VPCs are working correctly. Suddenly, you receive an alert that none of the flows between the two VPCs are working anymore. You need to troubleshoot the problem. What should you do? (Choose 2 answers)

Options:

A.

Verify that the dual-NIC instance has not been added to a backend service.

B.

Verify that a public IP address has not been assigned to any network interface of the dual-NIC instance.

C.

Use Cloud Logging to verify that there were no modifications to the VPC firewall rules or policies that were applied to the two network interfaces of the dual-NIC instance.

D.

Verify that a VPC Service Controls perimeter has not been enabled for the project that contains the two VPCs and the dual-NIC instance.

E.

Verify that the dual-NIC instance has the --can-ip-forward attribute enabled.

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Questions 40

One instance in your VPC is configured to run with a private IP address only. You want to ensure that even if this instance is deleted, its current private IP address will not be automatically assigned to a different instance.

In the GCP Console, what should you do?

Options:

A.

Assign a public IP address to the instance.

B.

Assign a new reserved internal IP address to the instance.

C.

Change the instance’s current internal IP address to static.

D.

Add custom metadata to the instance with key internal-address and value reserved.

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Questions 41

Your company runs an enterprise platform on-premises using virtual machines (VMS). Your internet customers have created tens of thousands of DNS domains panting to your public IP addresses allocated to the Vtvls Typically, your customers hard-code your IP addresses In their DNS records You are now planning to migrate the platform to Compute Engine and you want to use Bring your Own IP you want to minimize disruption to the Platform What Should you d0?

Options:

A.

Create a VPC and request static external IP addresses from Google Cloud Assagn the IP addresses to the Compute Engine instances. Notify your customers of the new IP addresses so they can update their DNS

B.

Verify ownership of your IP addresses. After the verification, Google Cloud advertises and provisions the IP prefix for you_ Assign the IP addresses to the Compute Engine Instances

C.

Create a VPC With the same IP address range as your on-premises network Asson the IP addresses to the Compute Engine Instances.

D.

Verify ownership of your IP addresses. Use live migration to import the prefix Assign the IP addresses to Compute Engine instances.

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Questions 42

You are deploying an HA VPN within Google Cloud. You need to exchange routes dynamically between your on-premises gateway and Google Cloud. You have already created an HA VPN gateway and a peer VPN gateway resource. What should you do?

Options:

A.

Create a Cloud Router, add VPN tunnels, and then configure BGP sessions.

B.

Create a second HA VPN gateway, add VPN tunnels, and enable global dynamic routing.

C.

Create a Cloud Router, add VPN tunnels, and enable global dynamic routing.

D.

Create a Cloud Router, add VPN tunnels, and then configure static routes to your subnet ranges.

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Questions 43

You are responsible for configuring firewall policies for your company in Google Cloud. Your security team has a strict set of requirements that must be met to configure firewall rules.

Always allow Secure Shell (SSH) from your corporate IP address.

Restrict SSH access from all other IP addresses.

There are multiple projects and VPCs in your Google Cloud organization. You need to ensure that other VPC firewall rules cannot bypass the security team’s requirements. What should you do?

Options:

A.

Configure a hierarchical firewall policy to the organization node to allow TCP port 22 for your corporate IP address with priority 0.

Configure a hierarchical firewall policy to the organization node to deny TCP port 22 for all IP addresses with priority 1.

B.

Configure a VPC firewall rule to allow TCP port 22 for your corporate IP address with priority 0.

Configure a VPC firewall rule to deny TCP port 22 for all IP addresses with priority 1.

C.

Configure a VPC firewall rule to allow TCP port 22 for your corporate IP address with priority 1.

Configure a VPC firewall rule to deny TCP port 22 for all IP addresses with priority 0.

D.

Configure a hierarchical firewall policy to the organization node to allow TCP port 22 for your corporate IP address with priority 1

Configure a hierarchical firewall policy to the organization node to deny TCP port 22 for all IP addresses with priority 0.

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Questions 44

You decide to set up Cloud NAT. After completing the configuration, you find that one of your instances is not using the Cloud NAT for outbound NAT.

What is the most likely cause of this problem?

Options:

A.

The instance has been configured with multiple interfaces.

B.

An external IP address has been configured on the instance.

C.

You have created static routes that use RFC1918 ranges.

D.

The instance is accessible by a load balancer external IP address.

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Questions 45

You recently noticed a recurring daily spike in network usage in your Google Cloud project. You need to identify the virtual machine (VM) instances and type of traffic causing the spike in traffic utilization while minimizing the cost and management overhead required. What should you do?

Options:

A.

Enable VPC Flow Logs and send the output to BigQuery for analysis.

B.

Enable Firewall Rules Logging for all allowed traffic and send the output to BigQuery for analysis.

C.

Configure Packet Mirroring to send all traffic to a VM. Use Wireshark on the VM to identity traffic utilization for each VM in the VPC.

D.

Deploy a third-party network appliance and configure it as the default gateway. Use the third-party network appliance to identify users with high network traffic.

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Questions 46

Your company offers a popular gaming service. Your instances are deployed with private IP addresses, and external access is granted through a global load balancer. You have recently engaged a traffic-scrubbing service and want to restrict your origin to allow connections only from the traffic-scrubbing service.

What should you do?

Options:

A.

Create a Cloud Armor Security Policy that blocks all traffic except for the traffic-scrubbing service.

B.

Create a VPC Firewall rule that blocks all traffic except for the traffic-scrubbing service.

C.

Create a VPC Service Control Perimeter that blocks all traffic except for the traffic-scrubbing service.

D.

Create IPTables firewall rules that block all traffic except for the traffic-scrubbing service.

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Questions 47

Your company has defined a resource hierarchy that includes a parent folder with subfolders for each department. Each department defines their respective project and VPC in the assigned folder and has the appropriate permissions to create Google Cloud firewall rules. The VPCs should not allow traffic to flow between them. You need to block all traffic from any source, including other VPCs, and delegate only the intra-VPC firewall rules to the respective departments. What should you do?

Options:

A.

Create a VPC firewall rule in each VPC to block traffic from any source, with priority 0.

B.

Create a VPC firewall rule in each VPC to block traffic from any source, with priority 1000.

C.

Create two hierarchical firewall policies per department's folder with two rules in each: a high-priority rule that matches traffic from the private CIDRs assigned to the respective VPC and sets the action to allow, and another lower-priority rule that blocks traffic from any other source.

D.

Create two hierarchical firewall policies per department's folder with two rules in each: a high-priority rule that matches traffic from the private CIDRs assigned to the respective VPC and sets the action to goto_next, and another lower-priority rule that blocks traffic from any other source.

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Questions 48

You need to establish network connectivity between three Virtual Private Cloud networks, Sales, Marketing, and Finance, so that users can access resources in all three VPCs. You configure VPC peering between the Sales VPC and the Finance VPC. You also configure VPC peering between the Marketing VPC and the Finance VPC. After you complete the configuration, some users cannot connect to resources in the Sales VPC and the Marketing VPC. You want to resolve the problem.

What should you do?

Options:

A.

Configure VPC peering in a full mesh.

B.

Alter the routing table to resolve the asymmetric route.

C.

Create network tags to allow connectivity between all three VPCs.

D.

Delete the legacy network and recreate it to allow transitive peering.

Questions 49

You are using the gcloud command line tool to create a new custom role in a project by coping a predefined role. You receive this error message:

INVALID_ARGUMENT: Permission resourcemanager.projects.list is not valid

What should you do?

Options:

A.

Add the resourcemanager.projects.get permission, and try again.

B.

Try again with a different role with a new name but the same permissions.

C.

Remove the resourcemanager.projects.list permission, and try again.

D.

Add the resourcemanager.projects.setIamPolicy permission, and try again.

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Questions 50

You need to define an address plan for a future new GKE cluster in your VPC. This will be a VPC native cluster, and the default Pod IP range allocation will be used. You must pre-provision all the needed VPC subnets and their respective IP address ranges before cluster creation. The cluster will initially have a single node, but it will be scaled to a maximum of three nodes if necessary. You want to allocate the minimum number of Pod IP addresses.

Which subnet mask should you use for the Pod IP address range?

Options:

A.

/21

B.

/22

C.

/23

D.

/25

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Questions 51

You have deployed an HTTP(s) load balancer, but health checks to port 80 on the Compute Engine virtual machine instance are failing, and no traffic is sent to your instances. You want to resolve the problem. Which commands should you run?

Options:

A.

gcloud compute instances add-access-config instance-1

B.

gcloud compute firewall-rules create allow-lb --network load-balancer --allow tcp --destination-ranges 130.211.0.0/22,35.191.0.0/16 --direction EGRESS

C.

gcloud compute firewall-rules create allow-lb --network load-balancer --allow tcp --source-ranges 130.211.0.0/22,35.191.0.0/16 --direction INGRESS

D.

gcloud compute health-checks update http health-check --unhealthy-threshold 10

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Questions 52

Question:

Your organization is deploying a mission-critical application with components in different regions due to strict compliance requirements. There are latency issues between different applications that reside in us-central1 and us-east4. The application team suspects the Google Cloud network as the source of the excessive latency despite using the Premium Network Service Tier. You need to use Google-recommended practices with the least amount of effort to verify the inter-region latency by investigating network performance. What should you do?

Options:

A.

Set up the Performance Dashboard in Network Intelligence Center. Select the traffic type (cross-zonal), the metric (latency - RTT), the time period, the desired regions (us-central1 and us-east4), and the network tier.

B.

Enable VPC Flow Logs for the VPC. Identify major bottlenecks from the application level using Flow Analyzer.

C.

Configure two Linux VMs in each zone for each region. Install the application, and run a load test using each zone from different regions.

D.

Configure a VM with a probe in Network Intelligence Center in each zone for each region. Choose the traffic type (cross-zonal), metric (latency - RTT), desired regions (us-central1 and us-east4), and the network tier.

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Questions 53

You are developing an HTTP API hosted on a Compute Engine virtual machine instance that must be invoked only by multiple clients within the same Virtual Private Cloud (VPC). You want clients to be able to get the IP address of the service. What should you do?

Options:

A.

Reserve a static external IP address and assign it to an HTTP(S) load balancing service's forwarding rule. Clients should use this IP address to connect to the service.

B.

Ensure that clients use Compute Engine internal DNS by connecting to the instance name with the url https://[INSTANCE_NAME].[ZONE] .c.[PROJECT_ID].internal/.

C.

Reserve a static external IP address and assign it to an HTTP(S) load balancing service's forwarding rule. Then, define an A record in Cloud DNS. Clients should use the name of the A record to connect to the service.

D.

Ensure that clients use Compute Engine internal DNS by connecting to the instance name with the url https://[API_NAME]/[API_VERSION] /.

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Questions 54

You are configuring a new instance of Cloud Router in your Organization’s Google Cloud environment to allow connection across a new Dedicated Interconnect to your data center Sales, Marketing, and IT each have a service project attached to the Organization’s host project.

Where should you create the Cloud Router instance?

Options:

A.

VPC network in all projects

B.

VPC network in the IT Project

C.

VPC network in the Host Project

D.

VPC network in the Sales, Marketing, and IT Projects

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Questions 55

Your organization is implementing a new security policy to control how firewall rules are applied to control flows between virtual machines (VMs). Using Google-recommended practices, you need to set up a firewall rule to enforce strict control of traffic between VM A and VM B. You must ensure that communications flow only from VM A to VM B within the VPC, and no other communication paths are allowed. No other firewall rules exist in the VPC. Which firewall rule should you configure to allow only this communication path?

Options:

A.

Firewall rule direction: ingress

Action: allow

Target: VM B service account

Source ranges: VM A service account

Priority: 1000

B.

Firewall rule direction: ingress

Action: allow

Target: specific VM B tag

Source ranges: VM A tag and VM A source IP address

Priority: 1000

C.

Firewall rule direction: ingress

Action: allow

Target: VM A service account

Source ranges: VM B service account and VM B source IP address

Priority: 100

D.

Firewall rule direction: ingress

Action: allow

Target: specific VM A tag

Source ranges: VM B tag and VM B source IP address

Priority: 100

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Questions 56

You have the following Shared VPC design VPC Flow Logs is configured for Subnet-1 In the host VPC. You also want to monitor flow logs for Subnet-2. What should you do?

Options:

A.

Configure a firewall rule to permit Subnet-2 IP addresses outbound in the host protect VPC.

B.

Configure Packet Mirroring in both the host and service project VPCs.

C.

Configure a VPC Flow Logs filter for Subnet-2 in the host project VPC.

D.

Configure VPC Flow Logs in the service project VPC for Subnet-2.

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Questions 57

Your organization's security policy requires that all internet-bound traffic return to your on-premises data center through HA VPN tunnels before egressing to the internet, while allowing virtual machines (VMs) to leverage private Google APIs using private virtual IP addresses 199.36.153.4/30. You need to configure the routes to enable these traffic flows. What should you do?

Options:

A.

Configure a custom route 0.0.0.0/0 with a priority of 500 whose next hop is the default internet gateway. Configure another custom route 199.36.153.4/30 with priority of 1000 whose next hop is the VPN tunnel back to the on-premises data center.

B.

Configure a custom route 0.0.0.0/0 with a priority of 1000 whose next hop is the internet gateway. Configure another custom route 199.36.153.4/30 with a priority of 500 whose next hop is the VPN tunnel back to the on-premises data center.

C.

Announce a 0.0.0.0/0 route from your on-premises router with a MED of 1000. Configure a custom route 199.36.153.4/30 with a priority of 1000 whose next hop is the default internet gateway.

D.

Announce a 0.0.0.0/0 route from your on-premises router with a MED of 500. Configure another custom route 199.36.153.4/30 with a priority of 1000 whose next hop is the VPN tunnel back to the on-

premises data center.

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Questions 58

You need to define an address plan for a future new Google Kubernetes Engine (GKE) cluster in your Virtual Private Cloud (VPC). This will be a VPC-native cluster, and the default Pod IP range allocation will be used. You must pre-provision all the needed VPC subnets and their respective IP address ranges before cluster creation. The cluster will initially have a single node, but it will be scaled to a maximum of three nodes if necessary. You want to allocate the minimum number of Pod IP addresses. Which subnet mask should you use for the Pod IP address range?

Options:

A.

/21

B.

/22

C.

/23

D.

/25

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Questions 59

You have ordered Dedicated Interconnect in the GCP Console and need to give the Letter of Authorization/Connecting Facility Assignment (LOA-CFA) to your cross-connect provider to complete the physical connection.

Which two actions can accomplish this? (Choose two.)

Options:

A.

Open a Cloud Support ticket under the Cloud Interconnect category.

B.

Download the LOA-CFA from the Hybrid Connectivity section of the GCP Console.

C.

Run gcloud compute interconnects describe .

D.

Check the email for the account of the NOC contact that you specified during the ordering process.

E.

Contact your cross-connect provider and inform them that Google automatically sent the LOA/CFA to them via email, and to complete the connection.

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Questions 60

(You are managing an application deployed on Cloud Run. The development team has released a new version of the application. You want to deploy and redirect traffic to this new version of the application. To ensure traffic to the new version of the application is served with no startup time, you want to ensure that there are two idle instances available for incoming traffic before adjusting the traffic flow. You also want to minimize administrative overhead. What should you do?)

Options:

A.

Ensure the checkbox "Serve this revision immediately" is unchecked when deploying the new revision. Before changing the traffic rules, use a traffic simulation tool to send load to the new revision.

B.

Configure service autoscaling and set the minimum number of instances to 2.

C.

Configure revision autoscaling for the new revision and set the minimum number of instances to 2.

D.

Configure revision autoscaling for the existing revision and set the minimum number of instances to 2.

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Questions 61

You are designing a hybrid cloud environment for your organization. Your Google Cloud environment is interconnected with your on-premises network using Cloud HA VPN and Cloud Router. The Cloud Router is configured with the default settings. Your on-premises DNS server is located at 192.168.20.88 and is protected by a firewall, and your Compute Engine resources are located at 10.204.0.0/24. Your Compute Engine resources need to resolve on-premises private hostnames using the domain corp.altostrat.com while still resolving Google Cloud hostnames. You want to follow Google-recommended practices. What should you do?

Options:

A.

Create a private forwarding zone in Cloud DNS for ‘corp.altostrat.com’ called corp-altostrat-com that points to 192.168.20.88.

Configure your on-premises firewall to accept traffic from 10.204.0.0/24.

Set a custom route advertisement on the Cloud Router for 10.204.0.0/24

B.

Create a private forwarding zone in Cloud DNS for ‘corp.altostrat.com’ called corp-altostrat-com that points to 192.168 20.88.

Configure your on-premises firewall to accept traffic from 35.199.192.0/19

Set a custom route advertisement on the Cloud Router for 35.199.192.0/19.

C.

Create a private forwarding zone in Cloud DNS for ‘corp .altostrat.com’ called corp-altostrat-com that points to 192.168.20.88.

Configure your on-premises firewall to accept traffic from 10.204.0.0/24.

Modify the /etc/resolv conf file on your Compute Engine instances to point to 192.168.20 88

D.

Create a private zone in Cloud DNS for ‘corp altostrat.com’ called corp-altostrat-com.

Configure DNS Server Policies and create a policy with Alternate DNS servers to 192.168.20.88.

Configure your on-premises firewall to accept traffic from 35.199.192.0/19.

Set a custom route advertisement on the Cloud Router for 35.199.192.0/19.

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Questions 62

You need to create the technical architecture for hybrid connectivity from your data center to Google Cloud This will be managed by a partner. You want to follow Google-recommended practices for production-level applications. What should you do?

Options:

A.

Ask the partner to install two security appliances in the data center. Configure one VPN connection from each of these devices to Google

Cloud, and ensure that the VPN devices on-premises are in separate racks on separate power and cooling systems.

B.

Configure two Partner Interconnect connections in one metropolitan area (metro). Make sure the Interconnect connections are placed in

different metro edge availability domains. Configure two VLAN attachments in a single region, and configure regional dynamic routing on

the VPC

C.

Configure two Partner Interconnect connections in one metro and two connections in another metro Make sure the Interconnect

connections are placed in different metro edge availability domains. Configure two VLAN attachments in one region and two VLAN

attachments in another region, and configure global dynamic routing on the VPC

D.

Configure two Partner Interconnect connections in one metro and two connections in another metro. Make sure the Interconnect connections are placed in different metro edge availability domains. Configure two VLAN attachments in one region and two VLAN attachments in another region, and configure regional dynamic routing on the VPC.

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Questions 63

You want to apply a new Cloud Armor policy to an application that is deployed in Google Kubernetes Engine (GKE). You want to find out which target to use for your Cloud Armor policy.

Which GKE resource should you use?

Options:

A.

GKE Node

B.

GKE Pod

C.

GKE Cluster

D.

GKE Ingress

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Questions 64

You have several VMs across multiple VPCs in your cloud environment that require access to internet endpoints. These VMs cannot have public IP addresses due to security policies, so you plan to use Cloud NAT to provide outbound internet access. Within your VPCs, you have several subnets in each region. You want to ensure that only specific subnets have access to the internet through Cloud NAT. You want to avoid any unintentional configuration issues caused by other administrators and align to Google-recommended practices. What should you do?

Options:

A.

Deploy Cloud NAT in each VPC and configure a custom source range that includes the allowed subnets. Configure Cloud NAT rules to only permit the allowed subnets to egress through Cloud NAT.

B.

Create a firewall rule in each VPC at priority 500 that targets all instances in the network and denies egress to the internet (0.0.0.0/0). Create a firewall rule at priority 300 that targets all instances in the network, has a source filter that maps to the allowed subnets, and allows egress to the internet (0.0.0.0/0). Deploy Cloud NAT and configure all primary and secondary subnet source ranges.

C.

Create a firewall rule in each VPC at priority 500 that targets all instances in the network and denies egress to the internet (0.0.0.0/0). Create a firewall rule at priority 300 that targets all instances in the network, has a source filter that maps to the allowed subnets, and allows egress to the internet (0.0.0.0/0). Deploy Cloud NAT and configure a custom source range that includes the allowed subnets.

D.

Create a constraints/compute.restrictCloudNATUsage organizational policy constraint. Attach the constraint to a folder that contains the associated projects. Configure the allowedValues to only contain the subnets that should have internet access. Deploy Cloud NAT and select only the allowed subnets.

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Questions 65

You have recently taken over responsibility for your organization's Google Cloud network security configurations. You want to review your Cloud Next Generation Firewall (Cloud NGFW) configurations to ensure that there are no rules allowing ingress traffic to your VMs and services from the internet. You want to avoid manual work. What should you do?

Options:

A.

Use Firewall Insights, and enable insights for overly permissive rules.

B.

Review Network Analyzer insights on the VPC network category.

C.

Export all your Cloud NGFW rules into a CSV file and search for 0.0.0.0/0.

D.

Run Connectivity Tests from multiple external sources to confirm that traffic is not allowed to ingress to your most critical services in Google Cloud.

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Questions 66

Your organization is developing a landing zone architecture with the following requirements:

    There should be no communication between production and non-production environments.

    Communication between applications within an environment may be necessary.

    Network administrators should centrally manage all network resources, including subnets, routes, and firewall rules.

    Each application should be billed separately.

    Developers of an application within a project should have the autonomy to create their compute resources.

    Up to 1000 applications are expected per environment.

You need to create a design that accommodates these requirements. What should you do?

Options:

A.

Create a design where each project has its own VPC. Ensure all VPCs are connected by a Network Connectivity Center hub that is centrally managed by the network team.

B.

Create a design that implements a single Shared VPC. Use VPC firewall rules with secure tags to enforce micro-segmentation between environments.

C.

Create a design that has one host project with a Shared VPC for the production environment, another host project with a Shared VPC for the non-production environment, and a service project that is associated with the corresponding host project for each initiative.

D.

Create a design that has a Shared VPC for each project. Implement hierarchical firewall policies to apply micro-segmentation between VPCs.

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Exam Name: Google Cloud Certified - Professional Cloud Network Engineer
Last Update: Apr 18, 2025
Questions: 220

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