Cisco
352-001 · Question #231
352-001 Question #231: Real Exam Question with Answer & Explanation
The correct answer is C: policy-based routing. Policy-based routing (PBR) allows a network designer to make forwarding decisions based on criteria beyond the destination address, including the source IP address, using route maps applied to an interface.
Question
Which tool enables a network designer to route traffic based on the source IP address?
Options
- Asource routing
- BMPLS Layer 3 VPNs
- Cpolicy-based routing
- Dunicast Reverse Path Forwarding
Explanation
Policy-based routing (PBR) allows a network designer to make forwarding decisions based on criteria beyond the destination address, including the source IP address, using route maps applied to an interface.
Common mistakes.
- A. Source routing refers to the IP header option where the originating host specifies the forwarding path inside the packet itself - it is a host-level mechanism, not a network design routing tool.
- B. MPLS Layer 3 VPNs use VRF tables and label switching to separate customer routing domains - they forward based on VPN labels and destination prefixes, not source IP addresses.
- D. Unicast Reverse Path Forwarding is a security feature that drops packets whose source IP does not match the expected ingress interface according to the routing table - it is not used to route or forward traffic based on source IP.
Concept tested. Policy-based routing for source IP-based forwarding
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