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Answer: Configure Cloud Interconnect and route traffic through an on-premises firewall.
Option D is the correct choice because it best meets both requirements: security and highest bandwidth. Cloud Interconnect provides dedicated, high-bandwidth connections (up to 200 Gbps per connection) with lower latency compared to VPN solutions, which are limited to 3 Gbps per HA VPN tunnel. Routing traffic through an on-premises firewall ensures centralized security policy enforcement and inspection. Option A (HA VPN) offers security but lower bandwidth. Option B (routing VM) introduces complexity and potential single points of failure without guaranteed high bandwidth. Option C combines Interconnect with HA VPN unnecessarily, as Interconnect alone suffices for high bandwidth, and adding VPN does not enhance the security objective when traffic is already routed through the on-premises firewall.
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You need to route all internet-bound traffic from Google Cloud through your on-premises network's internet connection. Your objectives are to do this securely and achieve the highest possible bandwidth.
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.