题目

Bob Metcalfe was named the winner of the 2022

A.M.Turing Award.Fifty years ago,Metcalfehelped invent (/),the localnetworking technology that links personal

computers around the world to the global internet.The fundamental problem of computer networkingwas how to share access to a network amongmany users.In the early 1960s computer scientistLeonard Kleinrock showed that (/)theory couldalso describe the flow of data through a network.Any user whose message was lost or garbledbecause of a conflict would simply try again aftera random time interval.In Metcalfe's improvedmodel,users would (/)adjust average wait timesbetween transmission attempts,taking the

frequency of (作答此空)into account:They'd be quickerto try again if the frequency was low,and they'd

(/)if the network was crowded,making

communication much more efficient overall.

作答

congestions

collisions

retransmissions

losses

答案/解析
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