● 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 the destinationmachine is chosen as part of the connection setup and stored in tables inside the （74） . Thatroute is used for all traffic flowing over the connection, exactly the same way that thetelephone system works. When the connection is released, the virtual circuit is alsoterminated. With connection-oriented service, each packet carries an （75） telling whichvirtual circuit it belongs to.（71）A. connectionless B. connection-oriented C. datagram D. telegram（72）A. processor B. device C. route D. terminal（73）A. source B. route C. destination D. host（74）A. connections B. resources C. bridges D. routers（75）A. address B. identifier C. interface D. element

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题目内容（请给出正确答案）

● For （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.

（71）A. connectionless B. connection-oriented C. datagram D. telegram

（72）A. processor B. device C. route D. terminal

（73）A. source B. route C. destination D. host

（74）A. connections B. resources C. bridges D. routers

（75）A. address B. identifier C. interface D. element

参考答案

更多 “ ● 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 the destinationmachine is chosen as part of the connection setup and stored in tables inside the （74） . Thatroute is used for all traffic flowing over the connection, exactly the same way that thetelephone system works. When the connection is released, the virtual circuit is alsoterminated. With connection-oriented service, each packet carries an （75） telling whichvirtual circuit it belongs to.（71）A. connectionless B. connection-oriented C. datagram D. telegram（72）A. processor B. device C. route D. terminal（73）A. source B. route C. destination D. host（74）A. connections B. resources C. bridges D. routers（75）A. address B. identifier C. interface D. element ” 相关考题

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