单选题Why is QoS important in a converged network?（）ABecause voice data packets must follow a single dedicated path through the networkBBecause voice data packets should arrive quickly and sequentially, and with no lost dataCBecause lost voice-data packets must be retransmittedDBecause data does not need to arrive intact, so data transfer rates can be variable
单选题
Why is QoS important in a converged network?（）
A
Because voice data packets must follow a single dedicated path through the network
B
Because voice data packets should arrive quickly and sequentially, and with no lost data
C
Because lost voice-data packets must be retransmitted
D
Because data does not need to arrive intact, so data transfer rates can be variable
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