1. Packet switching versus circuit switching. Which of the following statements are true? Choose all that applies. (There can be more than 1 answer)

A.

Packet switching leads to a lower end-to-end delay than circuit switching.

B.

Circuit switching is used by the telephone network.

C.

Circuit switching leads to a lower variation in end-to-end delay.

D.

Packet switching is more efficient than circuit switching for traffic that arrives in “bursts.”

2. Which of the following statements are true about packet switching? Choose all that applies. (There can be more than 1 answer)

A. In packet switching, packets are routed individually, hop-by-hop toward their destination.

B. In packet switching, packets are held in a buffer during times of congestion.

C. The Internet chose to use packet switching because it leads to stronger delay guarantees than the alternatives.



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