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
[单选题]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
[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
[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]A．n (71) service bus (ESB) acts as a shared messaging layer for connecting applications and other services throughout an enterprise computing infrastructure. It supplements its core (72) messaging backbone with intelligent tansformation and routing t
[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]When we use VolP service，the voice packets over the Internet arrive at their destination in a（ ） stream.A．burst B.delayed C.interrupted D.continuous
[单选题]We are at your service. Don’t to turn to us if you have any further problems.A． beg B. hesitate C. desire D. seek
Nature provides us with we need: the air we breathe, the water we drink, and the