Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 25

Which method changes the forwarding decision that a router makes without first changing the routing table or influencing the IP data plane?

Answer options

• A. nonbroadcast multiaccess
• B. packet switching
• C. policy-based routing
• D. forwarding information base

Correct answer: C

Explanation

The correct answer is C, policy-based routing, which allows a router to make forwarding decisions based on policies rather than relying solely on the routing table. The other options do not provide a mechanism for changing forwarding decisions independently of the routing table; for instance, packet switching is a method of transferring packets, while nonbroadcast multiaccess and forwarding information base relate to network types and data structures, respectively.