Free Google Professional-Cloud-Network-Engineer Exam Questions

Question 1

You configured Cloud VPN with dynamic routing via Border Gateway Protocol (BGP). You added a custom route to advertise a network that is reachable over the VPN tunnel. However, the on-premises clients still cannot reach the network over the VPN tunnel. You need to examine the logs in Cloud Logging to confirm that the appropriate routers are being advertised over the VPN tunnel. Which filter should you use in Cloud Logging to examine the logs?

A : resource.type= “gce_router”

B : resource.type= “gce_network_region”

C : resource.type= “vpn_tunnel”

D : resource.type= “vpn_gateway”

Answer: C

Question 2

You are designing a packet mirroring policy as pan of your network security architecture for your gaming workload. Your Infrastructure is located in the us-west2 region and deployed across several zones: us-west2- a. us-west2-b. and us-west2-c The Infrastructure Is running a web-based application on TCP ports 80 and 443 with other game servers that utilize the UDP protocol. You need to deploy packet mirroring policies and collector instances to monitor web application traffic while minimizing inter-zonal network egress costs. Following Google-recommended practices, how should you deploy the packet mirroring policies and collector instances?

A : Create three packet mirroring policies: one for each zone. Create three groups of collector instances: one group for each zone. Configure each policy to match traffic for Its zone based on instance-tags, and create a filter for TCP traffic.

B : Create three packet mirroring policies: one for each zone. Create three groups of collector instances: one group for each zone. Configure each policy to match traffic for its zone based on subnets, and create a filter for TCP traffic

C : Create one packet mirroring policy for the us-west2 region. Create one group of collector instances for the us-west2 region Configure the packet mirroring policy to match traffic for web server instances based on instance-tags, and create a filter for TCP traffic.

D : Create three packet mirroring policies: one for each zone. Create one group of collector instances for the us-west2 region. Configure each packet mirroring policy to match traffic for its zone based on instance-tags, and create a filter for TCP traffic

Answer: D

Question 3

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)

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.

Answer: C,E

Question 4

You are migrating a three-tier application architecture from on-premises to Google Cloud. As a first step in the migration, you want to create a new Virtual Private Cloud (VPC) with an external HTTP(S) load balancer. This load balancer will forward traffic back to the on-premises compute resources that run the presentation tier. You need to stop malicious traffic from entering your VPC and consuming resources at the edge, so you must configure this policy to filter IP addresses and stop cross-site scripting (XSS) attacks. What should you do?

A : Create a Google Cloud Armor policy, and apply it to a backend service that uses an unmanaged instance group backend.

B : Create a hierarchical firewall ruleset, and apply it to the VPC's parent organization resource node.

C : Create a Google Cloud Armor policy, and apply it to a backend service that uses an internet network endpoint group (NEG) backend.

D : Create a VPC firewall ruleset, and apply it to all instances in unmanaged instance groups.

Answer: C

Question 5

Your organization recently exposed a set of services through a global external Application Load Balancer. After conducting some testing, you observed that responses would intermittently yield a non-HTTP 200 response. You need to identify the error. What should you do? (Choose 2 answers)

A : Access a VM in the VPC through SSH, and try to access a backend VM directly. If the request is successful from the VM, increase the quantity of backends.

B : Enable and review the health check logs. Review the error responses in Cloud Logging.

C : Validate the health of the backend service. Enable logging on the load balancer, and identify the error response in Cloud Logging. Determine the cause of the error by reviewing the statusDetails log field.

D : Delete the load balancer and backend services. Create a new passthrough Network Load Balancer. Configure a failover group of VMs for the backend.

E : Validate the health of the backend service. Enable logging for the backend service, and identify the error response in Cloud Logging. Determine the cause of the error by reviewing the statusDetails log field.

Answer: B,C