单项选择题
In a lab, two routers are connected directly together using serial interfaces in a back-to-back configuration. No external DCE devices are being used. What additional command is needed to bring this link up?（）
A.serialup
B.clock
C.clockrate
D.dcerate
E.dterate
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相关考题
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单项选择题
You have just obtained a modular Cisco router with 2 serial connections and a BRI/U interface. What other physical piece of hardware is required in order to establish an ISDN connection?（）
A. Nothing. The router is already suitable.
B. A BRI WAN interface in the router.
C. An external NT1 to terminate the local loop.
D. A TA/NT1 device on the router. -
多项选择题
Which of the following can LCP successfully negotiate during the establishment of a PPP connection?（）
A. Q.931
B. IPCP
C. multilink
D. CHAP
E. callback -
多项选择题
You are about to configure PPP n the interface of a Cisco router. Which authentication methods could you use?（）
A.SSL
B.SLIP
C.PAP
D.LAPB
E.CHAP
F.VNP
