Which routing protocol uses a path vector routing approach?

Optimize your success on the FSNA Readiness Exam. Engage with flashcards and multiple choice questions, each designed with hints and explanations. Prepare thoroughly for your test and excel!

Multiple Choice

Which routing protocol uses a path vector routing approach?

Path vector routing is the method used for interdomain routing where each route advertisement carries the path information as a sequence of autonomous systems. The key feature is the AS_PATH attribute, which lists the chain of ASes a destination’s route has traversed. This lets routers apply routing policies and prevents loops by ensuring a route doesn’t re-enter an AS along a path it has already seen. The protocol that uses this approach is BGP. It advertises routes with attributes like AS_PATH, NEXT_HOP, LOCAL_PREF, and MED, and it relies on TCP for reliable transport to enable scalable, policy-driven routing across many autonomous systems. RIP isn’t path-vector; it uses hop count as its metric and floods updates. OSPF is a link-state protocol that builds a complete map of the network within an AS. EIGRP uses a diffusion update algorithm with multiple metrics but does not encode the path as an AS sequence.

Path vector routing is the method used for interdomain routing where each route advertisement carries the path information as a sequence of autonomous systems. The key feature is the AS_PATH attribute, which lists the chain of ASes a destination’s route has traversed. This lets routers apply routing policies and prevents loops by ensuring a route doesn’t re-enter an AS along a path it has already seen. The protocol that uses this approach is BGP. It advertises routes with attributes like AS_PATH, NEXT_HOP, LOCAL_PREF, and MED, and it relies on TCP for reliable transport to enable scalable, policy-driven routing across many autonomous systems.

RIP isn’t path-vector; it uses hop count as its metric and floods updates. OSPF is a link-state protocol that builds a complete map of the network within an AS. EIGRP uses a diffusion update algorithm with multiple metrics but does not encode the path as an AS sequence.

More practice questions