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Google Professional-Cloud-Network-Engineer Exam Syllabus Topics:

Section	Objectives
Implement network security	- Secure Google Cloud network environments 1. Configure Cloud Armor policies 2. Implement secure SSH access 3. Configure third-party network security appliances 4. Configure Identity and Access Management
Configure network services	- Deploy and manage Google Cloud network services 1. Enable additional networking services 2. Configure Cloud DNS 3. Configure Cloud CDN 4. Configure load balancing
Manage, monitor, and optimize network operations	- Monitor and troubleshoot network infrastructure 1. Analyze latency and traffic flow 2. Optimize network cost and performance 3. Troubleshoot connectivity issues 4. Monitor logs and metrics
Implement hybrid interconnectivity	- Implement hybrid networking solutions 1. Configure Cloud Router and dynamic routing 2. Configure Cloud Interconnect 3. Implement site-to-site connectivity 4. Configure Cloud VPN
Implement Virtual Private Cloud (VPC) instances	- Configure and manage VPC networks 1. Configure subnets and routes 2. Manage GKE networking 3. Implement Shared VPC 4. Configure firewall rules
Design, plan, and prototype a Google Cloud network	- Design overall network architecture 1. Design hybrid network connectivity 2. Plan secure and scalable network topologies 3. Design IP addressing plans for Google Kubernetes Engine 4. Design Virtual Private Cloud (VPC) networks

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Google Cloud Certified - Professional Cloud Network Engineer Sample Questions (Q308-Q313):

NEW QUESTION # 308
Your organization has over 250 autonomous business units that currently operate in a decentralized manner. Due to the organization's maturity, there is limited routable private IP address space, which is insufficient to accommodate all of the necessary workloads. You need to create a cloud-first network design that uses the same IP address space across business unit workloads where possible. These business units require communication between units, and access to their on-premises data center. What should you do?

A. Create a Network Connectivity Center design that incorporates Private Service Connect to provide bidirectional communication between VPC spokes, and a Routing VPC to exchange dynamic routes from the on-premises environment.
B. Create a hub and spoke model that incorporates VPC Network Peering with hybrid connectivity centralized within the hub.
C. Create a Network Connectivity Center design that incorporates Private NAT to facilitate communication between VPC spokes, and a Routing VPC to exchange dynamic routes from the on-premises environment.
D. Create a hub and spoke design that incorporates a centralized network virtual appliance (NVA) in the hub to perform routing and NAT between spokes.

Answer: C

Explanation:
Using Network Connectivity Center (NCC) with Private NAT allows overlapping IP address spaces across business units while ensuring communication between VPC spokes. Private NAT translates overlapping IP ranges to non-conflicting ranges, enabling seamless inter-VPC communication. Additionally, a Routing VPC centralizes dynamic route exchanges with the on- premises environment through Cloud Router, ensuring scalable and efficient hybrid connectivity.

NEW QUESTION # 309
Your organization is deploying a single project for 3 separate departments. Two of these departments require network connectivity between each other, but the third department should remain in isolation. Your design should create separate network administrative domains between these departments. You want to minimize operational overhead.
How should you design the topology?

A. Create a Shared VPC Host Project and the respective Service Projects for each of the 3 separate departments.
B. Create 3 separate VPCs, and use Cloud VPN to establish connectivity between the two appropriate VPCs.
C. Create a single project, and deploy specific firewall rules. Use network tags to isolate access between the departments.
Use Shared VPC to connect to a common VPC network. Resources in those projects can communicate with each other securely and efficiently across project boundaries using internal IPs. You can manage shared network resources, such as subnets, routes, and firewalls, from a central host project, enabling you to apply and enforce consistent network policies across the projects.
With Shared VPC and IAM controls, you can separate network administration from project administration. This separation helps you implement the principle of least privilege. For example, a centralized network team can administer the network without having any permissions into the participating projects. Similarly, the project admins can manage their project resources without any permissions to manipulate the shared network.
D. Create 3 separate VPCs, and use VPC peering to establish connectivity between the two appropriate VPCs.

Answer: A

NEW QUESTION # 310
Your organization has a hub and spoke architecture with VPC Network Peering, and hybrid connectivity is centralized at the hub. The Cloud Router in the hub VPC is advertising subnet routes, but the on-premises router does not appear to be receiving any subnet routes from the VPC spokes. You need to resolve this issue. What should you do?

A. Create custom routes at the Cloud Router in the hub to advertise the subnets of the VPC spokes.
B. Create custom learned routes at the Cloud Router in the hub to advertise the subnets of the VPC spokes.
C. Create custom routes at the Cloud Router in the spokes to advertise the subnets of the VPC spokes.
D. Create a BGP route policy at the Cloud Router, and ensure the subnets of the VPC spokes are being announced towards the on-premises environment.

Answer: D

Explanation:
In a hub-and-spoke architecture with hybrid connectivity, subnet routes from the spoke VPCs are not automatically advertised to the on-premises environment. This is because VPC Network Peering does not propagate routes from one VPC to another by default. To resolve this issue:
Create a BGP route policy at the Cloud Router in the hub VPC: A BGP route policy ensures that the subnet routes from the VPC spokes, learned via VPC peering, are advertised to the on- premises environment through the hybrid connection. This step is necessary because the Cloud Router only advertises routes explicitly configured in its route policy.
Verify subnet route export/import settings in VPC peering: Ensure that the VPC peering connections between the hub and the spokes are configured to allow the import/export of subnet routes as required.
By creating and applying a BGP route policy, the subnet routes from the spoke VPCs will be announced to the on-premises router, ensuring proper routing and connectivity in the hybrid architecture.

NEW QUESTION # 311
All the instances in your project are configured with the custom metadata enable-oslogin value set to FALSE and to block project-wide SSH keys. None of the instances are set with any SSH key, and no project-wide SSH keys have been configured. Firewall rules are set up to allow SSH sessions from any IP address range.
You want to SSH into one instance.
What should you do?

A. Generate a new SSH key pair. Verify the format of the private key and add it to the instance. SSH into the instance using a third-party tool like putty or ssh.
B. Generate a new SSH key pair. Verify the format of the public key and add it to the project. SSH into the instance using a third-party tool like putty or ssh.
C. Open the Cloud Shell SSH into the instance using gcloud compute ssh.
D. Set the custom metadata enable-oslogin to TRUE, and SSH into the instance using a third-party tool like putty or ssh.

Answer: C

NEW QUESTION # 312
You are designing a new global application using Compute Engine instances that will be exposed by a global HTTP(S) load balancer. You need to secure your application from distributed denial- of-service and application layer (layer 7) attacks. What should you do?

A. Configure hierarchical firewall rules for the global HTTP(S) load balancer public IP address at the organization level.
B. Configure VPC Service Controls and create a secure perimeter. Define fine-grained perimeter controls and enforce that security posture across your Google Cloud services and projects.
C. Configure a Google Cloud Armor security policy in your project, and attach it to the backend service to secure the application.
D. Configure VPC firewall rules to protect the Compute Engine instances against distributed denial- of-service attacks.

Answer: C

Explanation:
https://cloud.google.com/armor
Security policies to help protect your load-balanced applications from distributed denial of service (DDoS) and other web-based attacks.

NEW QUESTION # 313
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