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

Section	Objectives
Implement hybrid connectivity	- Dedicated and partner interconnect 1. High availability design patterns 2. VLAN attachments and configuration - VPN and peering 1. HA VPN setup 2. VPC peering and Shared VPC
Manage, monitor, and optimize network operations	- Network monitoring and logging 1. Cloud Monitoring and Logging usage 2. Network Intelligence Center tools - Security and troubleshooting 1. Firewall and security policy troubleshooting 2. Latency and connectivity diagnostics
Design and plan a Google Cloud network	- VPC design and topology planning 1. Regional vs global architecture considerations 2. Subnet design and IP address planning - Hybrid and multi-cloud architecture design 1. Routing strategy design (BGP) 2. Interconnect and VPN planning
Implement virtual networks	- Load balancing and traffic management 1. HTTP(S), TCP/SSL load balancing 2. Cloud DNS configuration - VPC configuration 1. Custom mode VPC setup 2. Firewall rules configuration

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Google Professional-Cloud-Network-Engineer Zertifizierungsfragen & Professional-Cloud-Network-Engineer Online Tests

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Google Cloud Certified - Professional Cloud Network Engineer Professional-Cloud-Network-Engineer Prüfungsfragen mit Lösungen (Q174-Q179):

174. Frage
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?

A. GKE Node
B. GKE Ingress
C. GKE Pod
D. GKE Cluster

Antwort: C

175. Frage
You are deploying an application on a fleet of Compute Engine virtual machines (VMs) that must process sensitive, financial data by communicating with the Cloud Storage API. The VMs currently have internal IP addresses. You need to enable this communication using the most secure method available. What should you do? (Choose two.)

A. Keep the VMs configured with only internal IP addresses. On the subnet, enable Private Google Access and configure the necessary private DNS records for private.googleapis.com.
B. Create a Cloud DNS private zone for googleapis.com that resolves to the restricted.googleapis.com IP addresses, and associate the private zone with the VMs' VPC network.
C. Create a Cloud NAT gateway, and configure it for the subnet housing the VMs. Remove the
0.0.0.0/0 route to the default internet gateway.
D. Modify the VMs to each have an external IP address. Create a restrictive egress firewall rule that only allows outbound traffic to the public IP ranges for Google APIs.
E. Create a regional Private Service Connect endpoint in your VPC that targets the Cloud Storage service. Configure the application on the VMs to send API requests to this endpoint.

Antwort: A,B

Begründung:
Enabling Private Google Access allows Compute Engine VMs that have only internal IP addresses to reach Google APIs privately without needing external IPs. Using private DNS to direct Google API names to the restricted Google APIs VIPs ensures the VMs reach the Cloud Storage API over Google-controlled endpoints while reducing exposure to the public internet path for API access.

176. Frage
You create multiple Compute Engine virtual machine instances to be used as TFTP servers.
Which type of load balancer should you use?

A. Network load balancer
B. TCP proxy load balancer
C. HTTP(S) load balancer
D. SSL proxy load balancer

Antwort: A

177. Frage
Your organization has five different VPCs across different projects in y our Google Cloud organization that need high-throughput connectivity. You have performed an audit of the IP address utilization in each VPC, and there are two overlapping subnets that are used by two of the VPCs: 240.0.0.0/16 and 240.128.0.0/24. You have confirmed that no Class E subnets (240.0.0.0/4) will require inter-VPC connectivity, but all other subnets in the VPCs will need connectivity. You need to deploy a Google Cloud routing solution to meet the connectivity requirements. What should you do?

A. Create a series of multiple network interface VMs with an interface in each VPC. Place the VMs in an instance group. Create an internal passthrough Network Load Balancer in each VPC with the backend of the instance group. Configure custom static routes in each VPC with the next hop of the respective load balancer. Add Cloud network firewall policy rules to allow traffic.
B. Create a full mesh of VPC Network Peering connections between all five VPCs with an export exclude filter for 240.0.0.0/4 on every side. Add Cloud network firewall policy rules to allow traffic.
C. Create a Network Connectivity Center hub with a mesh topology. Add a VPC spoke for each of the five VPCs and configure an export exclude filter for 240.0.0.0/4. Add Cloud network firewall policy rules to allow traffic.
D. Create a full mesh of VPC Network Peering connections between all five VPCs. Make sure not to import or export subnet routes with public IP addresses. Add Cloud network firewall policy rules to allow traffic.

Antwort: C

Begründung:
Network Connectivity Center with a Mesh Topology: Network Connectivity Center (NCC) provides a scalable and managed solution for interconnecting multiple VPCs. A mesh topology allows all VPCs to communicate with each other without requiring direct peering connections between every pair of VPCs, simplifying the configuration and management for a high-throughput environment.
Exclusion of Overlapping Subnets: Using an export exclude filter for 240.0.0.0/4, you ensure that overlapping subnets within the Class E address range (240.0.0.0/4) are not included in the routing table, which avoids routing conflicts between the two overlapping subnets.
Firewall Policy Rules: Adding appropriate Cloud network firewall rules ensures that only authorized traffic is allowed between the VPCs, enhancing security and maintaining compliance with organizational policies.

178. Frage
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 HTTP 4xx or 5xx error response codes. You already enabled and reviewed the health check logs.
You need to identify the error. What should you do?

A. Validate the health of the backend service. Disable any Cloud Armor policies on the backend service, and identify any error response in Cloud Logging. Review the statusDetails log field.
B. Validate the health of the backend service. Enable logging for the backend service and identify the error response in Cloud Logging. Review the statusDetails log field.
C. Delete the load balancer and backend services. Create a new Passthrough Network Load Balancer. Configure a failover group of VMs for the backend.
D. Access a VM in the VPC through SSH to access the backend VM directly. If the request is successful from the VM, increase the quantity of backends.

Antwort: B

Begründung:
When using a global external Application Load Balancer, intermittent HTTP 4xx or 5xx errors are often related to backend health or configuration issues. To diagnose the issue effectively:
1. Validate the health of the backend service to ensure that the instances are correctly responding to requests and passing health checks.
2. Enable logging for the backend service in Google Cloud Logging, which provides detailed information about requests and responses, including error codes.
3. Review the statusDetails log field in Cloud Logging. This field provides specific details about why requests failed, which can help pinpoint configuration errors, network issues, or application- level problems.

179. Frage
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