F．or (71) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (72) for every packet sent. Instead, when a connection is established, a route from the (73)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (74) That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (75) telling which virtual circuit it belongs to.

A．connectionless

B．connection-oriented

C．datagram

D．telegram

[单选题] For （71） service, we need a virtual-circuit subnet. Let us see how that works. Theidea behind virtual circuits is to avoid having to choose a new （72） for every packet sent.Instead, when a connection is established, a route from the （73） machine to

[单选题,共用题干题] For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine

[单选题]Weneedachairman________.A．)forwhomeveryonehasconfidenceB)inwhomeveryonehasconfidenceC．)whoeveryonehasconfidenceofD)whomeveryonehasconfidenceon

[主观题]Weneedtocreateeducationstandardsthatprepareournextgenerationwhowillbe_______withanevenmorecompetitivemarket

[单选题]We need the clean shipped bills of （　） in complete set issued toorder and blank endorsed marked “freight paid”A . loadingB . ladingC . inspectingD . packing

[单选题]Service(71)Architecture aims to provide a model for the creation of service components in a wide range of languages and a model for assembling service components into a business solution -activities which are at the heart of building applications usi

[单选题]—We need to a time to have a talk,now!—What about tomorrow？I am too busy today.A．put up B.fix up C.use up D.look up

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