Which function does traffic shaping perform?
- It buffers and queues excess packets
- It buffers traffic without queuing it
- It queues traffic without buffering it
- It drops packets to control the output rate
Explanation: The following diagram illustrates the key difference between traffic policing and traffic shaping. Traffic policing propagates bursts. When the traffic rate reaches the configured maximum rate (or committed information rate), excess traffic is dropped (or remarked). The result is an output rate that appears as a saw-tooth with crests and troughs. In contrast to policing, traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time. The result of traffic shaping is a smoothed packet output rate.
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