Google Cloud Professional Cloud Network Engineer — Question 18

You are increasing your usage of Cloud VPN between on-premises and GCP, and you want to support more traffic than a single tunnel can handle. You want to increase the available bandwidth using Cloud VPN.
What should you do?

Answer options

• A. Double the MTU on your on-premises VPN gateway from 1460 bytes to 2920 bytes.
• B. Create two VPN tunnels on the same Cloud VPN gateway that point to the same destination VPN gateway IP address.
• C. Add a second on-premises VPN gateway with a different public IP address. Create a second tunnel on the existing Cloud VPN gateway that forwards the same IP range, but points at the new on-premises gateway IP.
• D. Add a second Cloud VPN gateway in a different region than the existing VPN gateway. Create a new tunnel on the second Cloud VPN gateway that forwards the same IP range, but points to the existing on-premises VPN gateway IP address.

Correct answer: C

Explanation

Option C is correct because adding a second on-premises VPN gateway allows for the creation of another tunnel that can share the load and increase bandwidth using the same IP range. Option A does not directly increase bandwidth; changing the MTU affects packet size but not the number of tunnels. Options B and D do not adequately address the need for increased bandwidth through the same on-premises gateway, as B does not utilize a separate gateway and D uses a different region which may introduce latency issues.