Cisco
352-001 · Question #484
352-001 Question #484: Real Exam Question with Answer & Explanation
The correct answer is A: traffic policing. Traffic policing is the correct SP-side mechanism to enforce bandwidth limits because it can be applied in both inbound and outbound directions on an interface, which traffic shaping cannot.
Question
You are asked to design a traffic policy to restrict traffic that leaves a customer site. Which technology should you recommend to enforce a bandwidth limit, inbound and outbound, on the service provider side?
Options
- Atraffic policing
- BWRED
- CLLQ
- Dtraffic shaping
Explanation
Traffic policing is the correct SP-side mechanism to enforce bandwidth limits because it can be applied in both inbound and outbound directions on an interface, which traffic shaping cannot.
Common mistakes.
- B. WRED is a congestion avoidance mechanism that probabilistically drops packets as queue depth increases but does not enforce a specific maximum bandwidth limit in either direction.
- C. LLQ provides low-latency priority queuing for real-time traffic classes but is a scheduling mechanism, not a bandwidth cap, and does not enforce hard rate limits in both inbound and outbound directions.
- D. Traffic shaping buffers excess packets to smooth output to a configured rate but can only be applied outbound on an interface, making it unable to enforce inbound bandwidth limits as required by the design.
Concept tested. Traffic policing for bidirectional SP bandwidth enforcement
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