07年11月網(wǎng)絡(luò)工程師模擬試題（5）上午試卷

　　(68) A.The hub

　　B.The bridge

　　C.The router

　　D.The proxy

　　(69) A.Ethernet

　　B.Token Bus

　　C.Token Ring

　　D.DQDB

　　(70) A.X.25

　　B.ATM

　　C.FDDI

　　D.SMDS

　　●In low-speed network,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down.In high-speed networks, this approach often works poorly, because in the (71) between sending the notification and notification arriving at the source, thousands of additional (72) may arrive.In ATM network , a major tool for preventing (73) is (74) control.When a host wants a new virtual (75) ,it must describe the traffic to be offered and the service expected.

　　(71) A.interval

　　B.time

　　C.slot

　　D.delay

　　(72) A.packets

　　B.cells

　　C.message

　　D.files

　　(73) A.collision

　　B.congestion

　　C.drop

　　D.delay

　　(74) A.flow

　　B.admission

　　C.traffic

　　D.time

　　(75) A.path

　　B.rout

　　C.circuit

　　D.way

2007下半年計(jì)算機(jī)軟件水平考試模擬試題匯總

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