Which two of these are differences between traffic policing and traffic shaping? (Choose two.)

Question

Options

• Awith traffic shaping, a router stores excess traffic in packet buffers until bandwidth is available again
• Bwith policing you can tune the buffer usage for traffic exceeding the specified CIR
• Cwith shaping you can tune the buffer usage for traffic exceeding the specified CIR
• Dshaping should only be applied for ingress traffic, policing only for egress
• Epolicing uses a token bucket algorithm, shaping uses an SPD algorithm

• A
  74% (45)
• B
  8% (5)
• D
  3% (2)
• E
  15% (9)

Explanation

Traffic policing and traffic shaping are both rate-limiting mechanisms, but they handle excess traffic differently. (A) is correct: shaping buffers excess traffic in a queue and transmits it when bandwidth becomes available, smoothing the traffic burst rather than discarding it. Policing simply drops or re-marks packets that exceed the configured rate without buffering. (C) is correct: because shaping uses buffers, you can tune buffer parameters for traffic exceeding the CIR - policing has no buffer to tune. (B) is incorrect because policing does not use buffers. (D) is backwards: policing is typically applied to ingress traffic and shaping to egress. (E) is incorrect: both policing and shaping use token bucket algorithms; SPD (Selective Packet Discard) is unrelated to shaping.

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