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Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) · Cisco
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B ¨For traffic shaping, packets that arrive that cannot be sent immediately are delayed in the data buffer.¨ https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_plcshp/configuration/xe-16/qos-plcshp-xe-16-book/qos-plcshp-oview.html#:~:text=their%20network%20needs.-,Traffic%20Shaping%20to%20Regulate%20Packet%20Flow,the%20interface%20receiving%20the%20packet.
B is correct
B is Correct. During congestion, traffic shaping buffers and queues packets above the committed rate. Answer A describes Policing dropping packets exceeding a certain bitrate. Answer C is describing packet fragmentation when the router receives an IP packet above 1500 bytes. Answer D is sort of describing Random Early Detection (RED) which is a congestion avoidance mechanism that randomly drops packets from RED-enabled interfaces or queues during periods of high congestion. RED tells the packet source to decrease its transmission rate. Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_conavd/configuration/xe-16/qos-conavd-xe-16-book/qos-conavd-cfg-wred.html#GUID-F7BA5018-770F-48B7-8103-EEF22A7FC479