You are routing all your internet facing traffic from Google Cloud through your on-premises internet connection. You want to accomplish this goal securely and with the highest bandwidth possible.
What should you do?
A.
Create an HA VPN connection to Google Cloud. Replace the default 0.0.0.0/0 route.
B.
Create a routing VM in Compute Engine. Configure the default route with the VM as the next hop.
C.
Configure Cloud Interconnect with HA VPN. Replace the default 0.0.0.0/0 route to an on-premises destination.
D.
Configure Cloud Interconnect and route traffic through an on-premises firewall.
I'm going to take back my answer - the Answer should be 'D'.... The Internet traffic from GCP is hair-pining through an Internet connection on-premise, which mean the on-premise has two (2) separate connections; to GCP and to the Internet.... So 'D' make more sense
The question states ' on-premise Internet connection'.... a Dedicated Interconnect IS NOT an Internet connection. Therefore C & D cannot be the correct choice - that leaves 'A'
Here's why option D is the recommended choice:
Cloud Interconnect: Google Cloud Interconnect is designed to provide dedicated and high-bandwidth connections between your on-premises network and Google Cloud. It offers higher bandwidth and lower latency compared to typical VPN connections.
On-Premises Firewall: By configuring Cloud Interconnect to route traffic through an on-premises firewall, you can ensure that all traffic between Google Cloud and the internet passes through your organization's firewall for security inspection and enforcement of security policies.
Option A (Creating an HA VPN connection) is suitable for setting up a VPN connection but may not provide the same high bandwidth as Cloud Interconnect. Additionally, replacing the default 0.0.0.0/0 route with an on-premises destination might not be necessary if you want to route all traffic through your on-premises internet connection.
Option B (Creating a routing VM in Compute Engine) can be used for routing, but it may introduce additional complexity and potential single points of failure.
Option C (Configuring Cloud Interconnect with HA VPN) combines two connectivity methods but may not be necessary if you only want to route traffic through your on-premises internet connection and not through a VPN.
If your objective is to securely route all internet-facing traffic from Google Cloud through your on-premises internet connection with the highest bandwidth possible, you should go for:
D. Configure Cloud Interconnect and route traffic through an on-premises firewall.
Reasons:
Highest Bandwidth: Cloud Interconnect offers higher bandwidth compared to VPN solutions.
Security: You're routing the traffic through an on-premises firewall, which gives you centralized control over security policies.
Stability: Cloud Interconnect is a dedicated connection, making it more reliable compared to VPNs.
Latency: Cloud Interconnect usually provides lower latency than HA VPN solutions, which is beneficial for performance.
"Each HA VPN tunnel can support up to 3 gigabits per second (Gbps) for the sum of ingress and egress traffic. This is a limitation of HA VPN."
https://cloud.google.com/network-connectivity/docs/vpn/quotas#limits
"An Interconnect connection is a logical connection to Google, made up of one or more physical circuits. You can request one of the following circuit choices: Up to 2 x 100 Gbps (200-Gbps) circuits."
https://cloud.google.com/network-connectivity/docs/interconnect/quotas
D imo
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