单选题What is the goal of QoS in a network？ （）Aprevent packets from being droppedBincrease available bandwidthCreduce hardware errorsDprovide predictable network serviceEeliminate propagation delayFeliminate jitter and packet loss
单选题
What is the goal of QoS in a network？ （）
A
prevent packets from being dropped
B
increase available bandwidth
C
reduce hardware errors
D
provide predictable network service
E
eliminate propagation delay
F
eliminate jitter and packet loss
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