Which static route allows for a backup route to the 172.16.1.0 network?

Which static route allows for a backup route to the 172.16.1.0 network?

• A. ip route 172.16.1.0 255.255.255.0 s0/0/0 121
• B. ip route 172.16.1.0 255.255.255.0 192.168.1.1
• C. ip route 172.16.1.0 255.255.255.0 s0/0/0 255
• D. ip route 172.16.1.0 255.255.255.0 10.0.0.1

Answer: (A)

The choice indicating "ip route 172.16.1.0 255.255.255.0 s0/0/0 121" is valid for establishing a backup route due to the specific administrative distance assigned to it. This command configures a static route to the 172.16.1.0 network, specifying the next-hop interface as s0/0/0, with an administrative distance of 121. Administrative distance (AD) is a value that routers use to determine the trustworthiness of a route: lower values are preferred over higher ones. In this case, static routes have a default AD of 1. By assigning an AD of 121 to this route, it allows this static route to be considered less desirable than other routes with a lower AD while still providing a backup option if primary routes fail. When a primary route becomes unavailable, the router will then use this backup static route because it is still valid should the primary method fail or become unreachable. This is an essential capability in routing stability and redundancy. The other options do not provide the same functionality or appropriate mechanism for a backup route. For instance, some may not specify an administrative distance or might have default or unnecessary configurations that would challenge their

The choice indicating "ip route 172.16.1.0 255.255.255.0 s0/0/0 121" is valid for establishing a backup route due to the specific administrative distance assigned to it. This command configures a static route to the 172.16.1.0 network, specifying the next-hop interface as s0/0/0, with an administrative distance of 121.

Administrative distance (AD) is a value that routers use to determine the trustworthiness of a route: lower values are preferred over higher ones. In this case, static routes have a default AD of 1. By assigning an AD of 121 to this route, it allows this static route to be considered less desirable than other routes with a lower AD while still providing a backup option if primary routes fail.

When a primary route becomes unavailable, the router will then use this backup static route because it is still valid should the primary method fail or become unreachable. This is an essential capability in routing stability and redundancy.

The other options do not provide the same functionality or appropriate mechanism for a backup route. For instance, some may not specify an administrative distance or might have default or unnecessary configurations that would challenge their