Things You Need to Know About the Google Professional-Cloud-Network-Engineer Exam Preparation

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

SectionObjectives
Topic 1: Design, plan, and prototype a Google Cloud network- Design overall network architecture
  • 1. Design Virtual Private Cloud (VPC) networks
  • 2. Design hybrid network connectivity
  • 3. Plan secure and scalable network topologies
  • 4. Design IP addressing plans for Google Kubernetes Engine
Topic 2: 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
Topic 3: Configure network services- Deploy and manage Google Cloud network services
  • 1. Configure load balancing
  • 2. Enable additional networking services
  • 3. Configure Cloud DNS
  • 4. Configure Cloud CDN
Topic 4: Implement network security- Secure Google Cloud network environments
  • 1. Implement secure SSH access
  • 2. Configure third-party network security appliances
  • 3. Configure Cloud Armor policies
  • 4. Configure Identity and Access Management
Topic 5: Implement hybrid interconnectivity- Implement hybrid networking solutions
  • 1. Implement site-to-site connectivity
  • 2. Configure Cloud VPN
  • 3. Configure Cloud Interconnect
  • 4. Configure Cloud Router and dynamic routing
Topic 6: Manage, monitor, and optimize network operations- Monitor and troubleshoot network infrastructure
  • 1. Optimize network cost and performance
  • 2. Monitor logs and metrics
  • 3. Troubleshoot connectivity issues
  • 4. Analyze latency and traffic flow

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Google Cloud Certified - Professional Cloud Network Engineer Sample Questions (Q290-Q295):

NEW QUESTION # 290
You are creating a new GKE standard cluster. You need to configure the cluster to ensure that pods can reach other VMs in Google Cloud in the 192.168.0.0/24 subnet using the source IP of the GKE nodes. What should you do?

Answer: B

Explanation:
By default, GKE uses SNAT (Source Network Address Translation) for pod egress traffic to destinations outside the cluster's IP ranges but within RFC 1918 private IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0
/16). This means that traffic from pods leaving the cluster for these private IP destinations will have their source IP address translated to the node's IP address.
To ensure pods can reach VMs in the 192.168.0.0/24 subnet using the source IP of the GKE nodes, you want the default SNAT behavior to apply to this destination. The default SNAT rule applies when the destination is an RFC 1918 address and the source is a pod IP that is not within the same RFC 1918 range as the destination (e.g., if your pods are in a 10.x.x.x range and the destination is 192.168.x.x).
Therefore, you should:
Set a GKE pod IP address range that fits in 10.0.0.0/8: This ensures that the pod IPs are within an RFC 1918 range different from 192.168.0.0/24.
Do NOT configure the --disable-default-snat flag: If you disable default SNAT, pods would use their own IP addresses as source IPs, which might not be routable to the 192.168.0.0/24 subnet unless specific routes are configured. The goal is to use the node's IP.
The combination of having pod IPs in a different RFC 1918 range and not disabling default SNAT ensures that GKE performs SNAT, making the node's IP the source for traffic destined for the 192.168.0.0/24 subnet.
Exact Extract:
"By default, GKE performs SNAT (Source Network Address Translation) for egress traffic from pods to destinations outside the cluster's IP address ranges but within the private IP address ranges defined in RFC
1918 (10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16). When SNAT occurs, the source IP address of the egress packets is the node's IP address instead of the pod's IP address."
"The --disable-default-snat flag, when used, disables this default SNAT behavior. If you want traffic to use the node's IP as the source when reaching internal RFC 1918 destinations, do not set this flag."Reference:
Google Kubernetes Engine Documentation - IP masquerade agent, Private IP addresses for GKE Pods and Services


NEW QUESTION # 291
You are migrating to Cloud DNS and want to import your BIND zone file.
Which command should you use?

Answer: B

Explanation:
Once you have the exported file from your other provider, you can use the gcloud dns record-sets import command to import it into your managed zone.
To import record-sets, you use the dns record-sets import command. The --zone-file-format flag tells importto expect a BIND zone formatted file. If you omit this flag, import expects a YAML-formatted records file.


NEW QUESTION # 292
Question:
Your multi-region VPC has had a long-standing HA VPN configured in "region 1" connected to your corporate network. You are planning to add two 10 Gbps Dedicated Interconnect connections and VLAN attachments in "region 2" to connect to the same corporate network. You need to plan for connectivity between your VPC and corporate network to ensure that traffic uses the Dedicated Interconnect connections as the primary path and the HA VPN as the secondary path. What should you do?

Answer: C

Explanation:
For the Dedicated Interconnect to be the primary connection over the HA VPN, you should:
Enable global dynamic routing mode to allow the VPC to distribute routes dynamically across regions.
Set the BGP priority for the VLAN attachments associated with the Dedicated Interconnect to a lower base priority (e.g., 100) than the HA VPN's priority (e.g., 20000) to ensure it is preferred.
Setting up global dynamic routing with adjusted BGP priorities on both Interconnect and VPN will allow dynamic routing of traffic based on set preferences and path attributes, such as MED and priority levels. This setup ensures the Dedicated Interconnect, with a lower priority value, becomes the primary path for traffic, while the HA VPN, with a higher priority, serves as a backup.
Reference: Google Cloud - Cloud Interconnect
Reference: Google Cloud - HA VPN Overview


NEW QUESTION # 293
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?

Answer: B

Explanation:
https://cloud.google.com/blog/products/networking/how-to-use-vpc-flow-logs-in-gcp-for-network-traffic-analysis


NEW QUESTION # 294
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?

Answer: C

Explanation:
Reference:
https://cloud.google.com/iam/docs/understanding-custom-roles


NEW QUESTION # 295
......

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