Question

Which of the situations might not require multiple routing protocols in a network?

(a) When a new Layer 2-only switch is added to the network

(b) When you are migrating from one routing protocol to another

(c) When you are using routers from multiple vendors

(d) When there are host-based routers from multiple vendors

Answer 1

Right choice is (a) When a new Layer 2-only switch is added to the network

The best I can explain: Multiple routing protocols are required only when we need to migrate from one routing protocol to another, or when we are using routers from multiple vendors, or when there are host-based routers from multiple vendors. Routing is not a layer-2 function so we don’t require multiple routing protocols when new layer-2 switch is added.