Google Professional Cloud Network Engineer Question 617
Select 4Google Cloud PlatformYou are designing a highly available architecture for a multi-NIC VM that routes private traffic between two VPC networks. To ensure traffic is routed correctly, you decide to use an internal load balancer (ILB) as the next hop. Which of the following steps are required to configure this solution correctly?
- A
Create a backend service and add the multi-NIC VM as a backend.
- B
Configure a forwarding rule for the internal load balancer with the appropriate IP address and port settings.
- C
Enable IP forwarding on the multi-NIC VM.
- D
Ensure that the health check for the internal load balancer is configured to match the backend configuration.
- E
Attach a Cloud NAT to the multi-NIC VM to enable traffic forwarding.
Show answer and explanation
Correct answers: A, B, C, D
Explanation
To configure an internal load balancer as a next hop for a multi-NIC VM, it is necessary to define a backend service, create a forwarding rule, enable IP forwarding on the VM, and configure health checks. These steps ensure that the load balancer can route traffic through the multi-NIC VM and maintain high availability. Cloud NAT is unrelated to this configuration as it is used for internet access, not internal traffic forwarding.
- A. Correct.
Correct: A backend service is required to define the backend VMs (in this case, the multi-NIC VM) and the traffic distribution policies for the internal load balancer.
- B. Correct.
Correct: A forwarding rule is needed to specify the IP address and ports that the internal load balancer listens to, allowing traffic to be routed through the ILB.
- C. Correct.
Correct: Enabling IP forwarding on the multi-NIC VM ensures the VM can forward packets that are not directly addressed to it, which is essential for routing traffic between VPCs.
- D. Correct.
Correct: Health checks must be configured correctly to ensure the internal load balancer can determine the availability of the backend (multi-NIC VM) and distribute traffic accordingly.
- E. Incorrect.
Incorrect: Cloud NAT is not required for this scenario, as its primary purpose is to provide internet access to private instances, not for internal routing or load balancing.