Google Cloud Professional Cloud Network Engineer — Question 25

You decide to set up Cloud NAT. After completing the configuration, you find that one of your instances is not using the Cloud NAT for outbound NAT.
What is the most likely cause of this problem?

Answer options

• A. The instance has been configured with multiple interfaces.
• B. An external IP address has been configured on the instance.
• C. You have created static routes that use RFC1918 ranges.
• D. The instance is accessible by a load balancer external IP address.

Correct answer: B

Explanation

The correct answer is B because having an external IP address directly assigned to an instance bypasses Cloud NAT, making it unable to use it for outbound NAT. Options A, C, and D do not directly prevent the instance from using Cloud NAT, as they relate to network configuration rather than IP addressing.