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What are two way sthat IP datagrams are passed from the ingress line module to the egress line module?（）
- A、over an ATM PVC
- B、over a FastEthernet bus
- C、overa Gigabit Ethernet bus
- D、over high speed serial bus
参考答案
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In a DSL network,which device terminates the PPP over Ethernet subscriber’s two－wire phone line?()
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In a DSL network，which device terminates the PPP over Ethernet subscriber’s two-wire phone line？（）A、RASB、DSLAMC、ATMswitchD、RADIUSserver
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A user is connected on a DSL line and is using a PPP over Ethernet service.Which network device strips the ATM header from the datagram and investigates the PPP header?（）A、DSLAMB、DSL modemC、ERX Edge RouterD、customer workstation
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The primary line module has failed and the spare line module is nowactive.What occurs，by default，when the primary line module returns to an operational status？（）A、The primary line module is inactive for five minutes and then becomes active.B、The primary line module is in standby mode，while the spare line module remains active.C、The primary line module becomes active immediately and the spare line module becomes inactive.D、The primary and spare line modules are active for five minutes，after which time the spare line module becomes inactive.
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单选题Singing for over two hours, Anita’s hoarseness prevented her hitting the high notes.A
Singing for over two hours, Anita’s hoarseness prevented her hitting the high notes.B
Singing for over two hours, Anita was unable to hit the high notes because of her hoarseness.C
Having sung for over two hours, Anita’s hoarseness prevented her from hitting the high notes.D
Having sung for over two hours, Anita was no longer able to hit the high notes because of her hoarseness.E
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单选题The primary line module has failed and the spare line module is nowactive.What occurs，by default，when the primary line module returns to an operational status？（）A
The primary line module is inactive for five minutes and then becomes active.B
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The primary line module becomes active immediately and the spare line module becomes inactive.D
The primary and spare line modules are active for five minutes，after which time the spare line module becomes inactive.
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单选题Date line passed eastbound,（）.A
jumping over todayB
backing to yesterdayC
jumping over tomorrowD
backing to the day before yesterday
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