Cisco
352-001 · Question #295
352-001 Question #295: Real Exam Question with Answer & Explanation
The correct answer is C: policy-based routing. Policy-based routing (PBR) allows traffic to be forwarded based on QoS markings or ACL matches, directing specific flows to a designated link independent of the routing table.
Question
To meet specific business requirements, QoS-marked traffic must be sent over a dedicated link. Which technology fulfills this requirement?
Options
- AMPLS
- BQ-in-Q tunneling
- Cpolicy-based routing
- DEIGRP with modified metrics
Explanation
Policy-based routing (PBR) allows traffic to be forwarded based on QoS markings or ACL matches, directing specific flows to a designated link independent of the routing table.
Common mistakes.
- A. MPLS provides label-switched path forwarding and traffic engineering capabilities but does not natively route traffic to a specific link based on QoS DSCP markings.
- B. Q-in-Q tunneling is a Layer 2 technique for stacking VLAN tags to extend L2 domains and provides no mechanism for QoS-based routing to a dedicated link.
- D. EIGRP metric modification influences path selection for all traffic in the routing domain and cannot selectively route only QoS-marked traffic over a specific dedicated link.
Concept tested. Policy-based routing for QoS-based traffic steering
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