Unlike weighted fair queuing, which occurs on a session basis, priority queuing occurs on a packetby-
packet basis and is ideal in network environments that carry time-sensitive traffic. When congestion
occurs on low-speed interfaces, priority queuing guarantees that traffic assigned a high priority
will be sent first. On the negative side, if the queue for high-priority traffic is always full and monopolizing
bandwidth, packets in the other queues will be severely delayed or dropped.