A company named RT&T has a network of n switching stations connected by m high-speed communications links. Each customer’s phone is directly connected to one station in his or her area. The engineers...



A company named RT&T has a network of n
switching stations connected by m high-speed communications links. Each
customer’s phone is directly connected to one station in his or her area. The
engineers of RT&T have developed a prototype video-phone system that allows
two customers to see each other during a phone call. However, to produce acceptable
image quality, the number of links used to transmit video signals between the
two parties cannot exceed four. Suppose that the RT&T network is
represented by a graph. Describe an efficient algorithm that computes, for each
station, the set of stations it can reach using no more than four links.

[2 marks]



Sep 05, 2022
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