Google Professional Cloud Network Engineer

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Explanation:

The correct answer involves configuring the hub VPC to route traffic through the internal load balancer (10.0.0.5) for default internet access, while ensuring the virtual appliance instances use the internet gateway. Key steps include:

Creating a default route in the hub pointing to the load balancer.
Replacing the hub's default internet gateway route with a higher-priority route (tagged for the appliances) to avoid routing loops.
Exporting the hub's custom routes so spokes import them, ensuring spokes use the hub's default route.
Spokes retain their default internet gateway route, but the imported hub route (with lower priority value) takes precedence, making manual deletion unnecessary. Option A correctly implements these steps. Option B incorrectly suggests deleting the spokes' default routes, which is redundant. Options C and D incorrectly handle route configuration (pointing to instances or manual spoke routes).

Explanation:

Creating a default route in the hub pointing to the load balancer.
Replacing the hub's default internet gateway route with a higher-priority route (tagged for the appliances) to avoid routing loops.
Exporting the hub's custom routes so spokes import them, ensuring spokes use the hub's default route.
Spokes retain their default internet gateway route, but the imported hub route (with lower priority value) takes precedence, making manual deletion unnecessary. Option A correctly implements these steps. Option B incorrectly suggests deleting the spokes' default routes, which is redundant. Options C and D incorrectly handle route configuration (pointing to instances or manual spoke routes).

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You are designing a hub-and-spoke network architecture for your company's cloud environment. All spokes must peer with the hub and use the hub's virtual appliance (configured in high-availability mode with two instances behind an internal load balancer at IP 10.0.0.5) for internet access. What steps should you take to implement this?

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Last updated: March 12, 2026 at 14:03

Create a default route in the hub VPC that points to IP address 10.0.0.5. 2. Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway. 3. Export the custom routes in the hub. 4. Import the custom routes in the spokes.

42.9%

Create a default route in the hub VPC that points to IP address 10.0.0.5. 2. Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway. 3. Export the custom routes in the hub. Import the custom routes in the spokes. 4. Delete the default internet gateway route of the spokes.

28.6%

Create two default routes in the hub VPC that point to the next hop instances of the virtual appliances. 2. Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway. 3. Export the custom routes in the hub. Import the custom routes in the spokes.

Create a default route in the hub VPC that points to IP address 10.0.0.5. 2. Delete the default internet gateway route in the hub VPC, and create a new higher-priority route that is tagged only to the appliances with a next hop of the default internet gateway. 3. Create a new route in the spoke VPC that points to IP address 10.0.0.5.

28.6%