Cisco
352-001 · Question #400
352-001 Question #400: Real Exam Question with Answer & Explanation
The correct answer is C: policy-based routing. Policy-based routing (PBR) can match traffic based on QoS markings and forward it out a specific interface, enabling dedicated-link steering for marked flows.
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
- Dtraffic policing
Explanation
Policy-based routing (PBR) can match traffic based on QoS markings and forward it out a specific interface, enabling dedicated-link steering for marked flows.
Common mistakes.
- A. MPLS provides label-switched forwarding and traffic engineering but does not natively steer traffic based on existing QoS markings to a dedicated local link.
- B. Q-in-Q tunneling is a Layer 2 VLAN stacking technology used to extend customer VLANs across provider networks and has no mechanism to route based on QoS markings.
- D. Traffic policing limits the rate of traffic flows by dropping or remarking excess packets but does not control which physical link that traffic traverses.
Concept tested. Policy-based routing for QoS-aware traffic steering
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