A video stream needs half the bandwidth of T1. Explain how a network administrator can use Class Based Weighted Fair Queuing (CBWFQ) to prevent multiple low-priority flows from swamping out a single high-priority flow reserved for the video stream.
CBWFQ provides this. The network administrator defines a class, places the video stream in the class, and tells the router to provide the minimum bandwidth for the class. Video is now given the bandwidth that it needs. A default class is used for the rest of the flow. This class is serviced using flow0based WFQ schemes allocating the remainder of the bandwidth (half the TL, in this example).