Google Professional-Cloud-Network-Engineer Free Certification Exam Questions Answer Jul 2025 update

You work for a multinational enterprise that is moving to GCP.

These are the cloud requirements:

• An on-premises data center located in the United States in Oregon and New York with Dedicated Interconnects connected to Cloud regions us-west1 (primary HQ) and us-east4 (backup)

• Multiple regional offices in Europe and APAC

• Regional data processing is required in europe-west1 and australia-southeast1

• Centralized Network Administration Team

Your security and compliance team requires a virtual inline security appliance to perform L7 inspection for URL filtering. You want to deploy the appliance in us-west1.

What should you do?

• Create 2 VPCs in a Shared VPC Host Project.• Configure a 2-NIC instance in zone us-west1-a in the Host Project.• Attach NIC0 in VPC #1 us-west1 subnet of the Host Project.• Attach NIC1 in VPC #2 us-west1 subnet of the Host Project.• Deploy the instance.• Configure the necessary routes and firewall rules to pass traffic through the instance.

• Create 2 VPCs in a Shared VPC Host Project.• Configure a 2-NIC instance in zone us-west1-a in the Service Project.• Attach NIC0 in VPC #1 us-west1 subnet of the Host Project.• Attach NIC1 in VPC #2 us-west1 subnet of the Host Project.• Deploy the instance.• Configure the necessary routes and firewall rules to pass traffic through the instance.

• Create 1 VPC in a Shared VPC Host Project.• Configure a 2-NIC instance in zone us-west1-a in the Host Project.• Attach NIC0 in us-west1 subnet of the Host Project.• Attach NIC1 in us-west1 subnet of the Host Project• Deploy the instance.• Configure the necessary routes and firewall rules to pass traffic through the instance.

• Create 1 VPC in a Shared VPC Service Project.• Configure a 2-NIC instance in zone us-west1-a in the Service Project.• Attach NIC0 in us-west1 subnet of the Service Project.• Attach NIC1 in us-west1 subnet of the Service Project• Deploy the instance.• Configure the necessary routes and firewall rules to pass traffic through the instance.

Question # 22

Your company acquired a new division. The new division’s network team requires complete control over their networking infrastructure. You need to extend your existing Google Cloud network infrastructure, that consists of a single VPC, to allow workloads from all divisions to communicate with each other. You want to avoid incurring extra costs and granting unnecessary permissions to the new division’s networking team. What should you do?

Q • Create a new project for the new division's network team.

• Create a new VPC within the new project.

• Establish a VPC peering between your existing VPC and the new division’s VPC.

• Grant roles/compute. networkAdmin on the newly created project to the new division’s network team group.

O * Create a new project for the new division’s network team.

• Create a new VPC within the new project.

• Establish a VPC peering between your existing VPC and the new division’s VPC.

• Create a new subnet dedicated to the new division’s workloads.

• Grant roles/compute .networkuser on the new project to the new division's network team group.

O • Create a new project for the new division's network team.

• Create a new VPC within the new project.

• Establish a VPN connection between your existing VPC and the new division's VPC.

• Grant roles/compute .networkAdmin on the newly created project to the new division’s network team group.

Q • Ensure that the project hosting the existing network infrastructure is enabled as a host project.

• Create a new subnet dedicated to the new division’s workloads in the existing VPC.

• Grant roles/compute. networkuser on the newly created subnet to the new division’s network team group.

Question # 23

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?

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

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

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

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

Question # 24

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?

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

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

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

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.

Question # 25

You want to configure a NAT to perform address translation between your on-premises network blocks and GCP.

Which NAT solution should you use?

Cloud NAT

An instance with IP forwarding enabled

An instance configured with iptables DNAT rules

An instance configured with iptables SNAT rules

Question # 26

Question:

Your organization has an on-premises data center. You need to provide connectivity from the on-premises data center to Google Cloud. Bandwidth must be at least 1 Gbps, and the traffic must not traverse the internet. What should you do?

Configure HA VPN by using high availability gateways and tunnels.

Configure Dedicated Interconnect by creating a VLAN attachment, activate the connection, and submit the pairing key to your service provider.

Configure Cross-Cloud Interconnect by creating a VLAN attachment, activate the connection, and then submit the pairing key to your service provider.

Configure Partner Interconnect by creating a VLAN attachment, submit the pairing key to your service provider, and activate the connection.

Question # 27

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?

The instance has been configured with multiple interfaces.

An external IP address has been configured on the instance.

You have created static routes that use RFC1918 ranges.

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

Question # 28

You suspect that one of the virtual machines (VMs) in your default Virtual Private Cloud (VPC) is under a denial-of-service attack. You need to analyze the incoming traffic for the VM to understand where the traffic is coming from. What should you do?

Enable Data Access audit logs of the VPC. Analyze the logs and get the source IP addresses from the subnetworks.get field.

Enable VPC Flow Logs for the subnet. Analyze the logs and get the source IP addresses from the connection field.

Enable VPC Flow Logs for the VPC. Analyze the logs and get the source IP addresses from the src_location field.

Enable Data Access audit logs of the subnet. Analyze the logs and get the source IP addresses from the networks.get field.

Question # 29

(You are developing an internet of things (IoT) application that captures sensor data from multiple devices that have already been set up. You need to identify the global data storage product your company should use to store this data. You must ensure that the storage solution you choose meets your requirements of sub-millisecond latency. What should you do?)

Store the IoT data in Spanner. Use caches to speed up the process and avoid latencies.

Store the IoT data in Bigtable.

Capture IoT data in BigQuery datasets.

Store the IoT data in Cloud Storage. Implement caching by using Cloud CDN.

Explanation:

Comprehensive and Detailed In Depth Explanation:

Let's evaluate each option based on the requirement of sub-millisecond latency for globally stored IoT data:

A. Spanner with Caching: While Spanner offers strong consistency and global scalability, the base latency might not consistently be sub-millisecond for all read/write operations globally. Introducing caching adds complexity and doesn't guarantee sub-millisecond latency for all initial reads or cache misses.

B. Bigtable: Bigtable is a highly scalable NoSQL database service designed for low-latency, high-throughput workloads. It excels at storing and retrieving large volumes of time-series data, which is typical for IoT sensor data. Its architecture is optimized for single-key lookups and scans, providing consistent sub-millisecond latency, making it a strong candidate for this use case.

C. BigQuery: BigQuery is a fully managed, serverless data warehouse designed for analytical queries on large datasets. While it's excellent for analyzing IoT data in batch, it's not optimized for the low-latency, high-throughput ingestion and retrieval required for real-time IoT applications with sub-millisecond latency needs.

D. Cloud Storage with Cloud CDN: Cloud Storage is object storage and is not designed for low-latency transactional workloads. Cloud CDN is a content delivery network that caches content closer to users for faster delivery, but it's not suitable for the primary storage of rapidly incoming IoT sensor data requiring sub-millisecond write latency.

Google Cloud Documentation References:

Cloud Bigtable Overview: https://cloud.google.com/bigtable/docs/overview - This document highlights Bigtable 's suitability for low-latency and high-throughput applications, including IoT. It mentions its ability to handle massive amounts of data with consistent performance.

Spanner Overview: https://cloud.google.com/spanner/docs/overview - While Spanner offers low latency, Bigtable is generally preferred for extremely high-throughput, low-latency use cases like raw sensor data ingestion due to its optimized architecture for such workloads.

BigQuery Overview: https://cloud.google.com/bigquery/docs/introduction - This emphasizes BigQuery 's analytical capabilities rather than low-latency operational workloads.

Cloud Storage Overview: https://cloud.google.com/storage/docs/overview - This describes Cloud Storage as object storage, not ideal for sub-millisecond latency reads and writes required for real-time IoT data.

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Question # 30

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)

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

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

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.

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

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

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