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多项选择题 Part of the configuration files for routers testking1 and testking2 are displayed below: If you were to enter the "show interface serial 0" command on router testking1,which of the following will be displayed?()

A、Serial 0 is down, line protocol is down

B、Serial 0 is up, line protocol is up

C、Open: IPCP, CDPCP

D、LCP closed

E、LCP open

  • B,E
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