Your customer asks you to assist with their traffic policy design. They want to guarantee a minimum amount of bandwidth to certain traffic classes. Which technique would you advise them to implement?

Question

Options

• AModular QoS CLI
• Bcommitted access Rate
• Cpolicy-based routing
• Dtraffic shaping

• A
  76% (22)
• B
  3% (1)
• C
  14% (4)
• D
  7% (2)

Explanation

Modular QoS CLI (MQC) is correct because it is Cisco's framework for defining traffic classes via class-map and applying bandwidth policies via policy-map, enabling Class-Based Weighted Fair Queuing (CBWFQ) - which explicitly guarantees a minimum bandwidth to each defined traffic class.

Committed Access Rate (B) is a policing tool that enforces a maximum rate by dropping or remarking excess traffic; it caps bandwidth rather than guaranteeing a floor.

Policy-based routing (C) controls where packets are forwarded based on defined criteria (source, protocol, etc.) - it's a routing decision tool, not a bandwidth management tool.

Traffic shaping (D) smooths bursts by delaying packets to meet a target rate, limiting the maximum throughput - it does not reserve or guarantee a minimum for any class.

Memory tip: Think of MQC as the "menu" - class-maps are the categories, policy-maps are the portions, and the bandwidth command is the guaranteed serving size. If the question mentions classes + guarantees, MQC is the answer.

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