What does route redistribution accomplish in multi-protocol networks?

What does route redistribution accomplish in multi-protocol networks?

• A. It merges two routing domains into a single protocol.
• B. It renames networks in the routing table.
• C. It blocks certain routes from being advertised.
• D. It allows routes learned from one routing protocol to be advertised into another protocol.

Answer: (D)

Route redistribution is about sharing reachability across different routing protocols running in the same network. It takes routes learned from one protocol and injects them into another protocol, so a device in the other domain can learn how to reach those networks. This is what lets end-to-end paths exist when parts of the network run different protocols, such as connecting an area using OSPF with another using EIGRP or BGP. When configuring redistribution, you typically do it at the boundary routers and may use route maps, metrics, and route tagging to control which routes are redistributed and to prevent loops or suboptimal paths. It doesn’t rename networks in the routing table, it doesn’t automatically block routes, and it doesn’t merge two domains into a single protocol.

Route redistribution is about sharing reachability across different routing protocols running in the same network. It takes routes learned from one protocol and injects them into another protocol, so a device in the other domain can learn how to reach those networks. This is what lets end-to-end paths exist when parts of the network run different protocols, such as connecting an area using OSPF with another using EIGRP or BGP. When configuring redistribution, you typically do it at the boundary routers and may use route maps, metrics, and route tagging to control which routes are redistributed and to prevent loops or suboptimal paths. It doesn’t rename networks in the routing table, it doesn’t automatically block routes, and it doesn’t merge two domains into a single protocol.