A high-speed network is often configured with a five-class QoS model. Which classes are
used in the model?
real-time, call-signaling, critical data, best-effort, and scavenger
real-time, signaling, critical data, best-effort and drop-class
call-signaling, real-time, critical data, best-effort, and drop-class
voice, video, signaling, critical data, and best-effort
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