單項選擇題You work as a network engineer at TestKing.com. TestKing users have noticed extremely slow network performance, intermittent connectivity, and connection loss. After entering the show interfaces command, you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that there is evidence of late collisions. What could be the cause of this problem?()

A. duplex mismatch
B. a routing loop
C. trunking mode mismatch
D. improperly configured root bridge
E. improperly configured static VLAN


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3.多項選擇題

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

5.單項選擇題While logged into a router, you wish to see the RIP routing updates in real time as they are sent and received. Which command would you issue to see these updates?()

A. Show ip protocols
B. Show ip route rip
C. Debug ip rip
D. Debug ip updates
E. Debug ip transactions

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