Google Professional Cloud Network Engineer Question 205
Select 2Google Cloud PlatformYour organization plans to migrate its workload to Google Cloud and implement IPv6 addressing for its network. The team wants to ensure that the IPv6 deployment aligns with best practices and avoids potential pitfalls when configuring the network. Which of the following actions should you take to properly plan for IPv6 in Google Cloud?
- A
Use only global IPv6 addresses for instances to simplify routing and connectivity.
- B
Enable IPv6 on Virtual Private Cloud (VPC) subnets and ensure proper allocation of /64 CIDR blocks.
- C
Configure Cloud NAT to support IPv6 traffic for outbound connectivity if required.
- D
Plan for dual-stack configurations to ensure both IPv4 and IPv6 compatibility during the transition.
- E
Use private IPv6 addresses within your VPC for internal communication to enhance security.
Show answer and explanation
Correct answers: B, D
Explanation
When planning for IPv6 in Google Cloud, it is crucial to enable IPv6 on VPC subnets and allocate /64 CIDR blocks, as this aligns with Google's best practices for IPv6 addressing. Additionally, adopting a dual-stack configuration ensures seamless compatibility with both IPv4 and IPv6 during the transition period. Avoid relying solely on global IPv6 addresses for security reasons, and note that Cloud NAT is not applicable to IPv6 traffic. Private IPv6 addresses are not supported in Google Cloud, so other security measures must be implemented.
- A. Incorrect.
Using only global IPv6 addresses is not recommended as it might expose instances directly to the internet, leading to potential security risks. A combination of private and public IPv6 addresses should be used depending on the use case.
- B. Correct.
Enabling IPv6 on VPC subnets and properly allocating /64 CIDR blocks is a best practice for IPv6 in Google Cloud, as it ensures compatibility and proper address management.
- C. Incorrect.
Cloud NAT does not support IPv6 traffic. IPv6 traffic is routed natively, so configuring Cloud NAT for IPv6 is not applicable.
- D. Correct.
Planning for dual-stack configurations is essential during the transition to IPv6, as it ensures compatibility with both IPv4 and IPv6, avoiding disruptions in connectivity.
- E. Incorrect.
Private IPv6 addresses are not supported in Google Cloud, as IPv6 in Google Cloud is designed to use global IPv6 addresses. Instead, proper firewall rules should be implemented to secure communication.