In a lab, two routers are connected directly together u

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

相关考题

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?（）

多项选择题 Which of the following can LCP successfully negotiate during the establishment of a PPP connection?（）

多项选择题 You are about to configure PPP n the interface of a Cisco router. Which authentication methods could you use?（）

CCNA(640-801)