A route map is primarily used for which purpose in routing and policy?

• A. To encrypt paths
• B. To assign IP addresses to interfaces
• C. To measure QoS and bandwidth
• D. To specify criteria for route manipulation and influence redistribution/next-hop decisions

Answer: (D)

Routing policy is the key idea here: a route map defines how routing information should be treated, allowing you to manipulate routes and control how they are redistributed or where next hops point.

A route map lets you specify match criteria (like destination prefixes, AS paths, or protocol) and then take actions such as setting the next-hop, changing metrics, or deciding which routes to redistribute between protocols. This makes it the primary tool for implementing policy-based routing and shaping how routing decisions are made, rather than just passing traffic along or performing simple tasks. For example, you can use a route map to push certain paths through a preferred exit by setting local preference or next-hop, or to control which routes get redistributed from one routing protocol into another.

Path encryption is handled by security mechanisms like IPsec, not by route maps. Assigning IP addresses to interfaces is done via DHCP or manual configuration. Measuring QoS and bandwidth is handled by QoS policies and monitoring tools, not by route maps.