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Q. 20
Which commands could be used at the command line interface to troubleshoot LAN connectivity
problems on a router? (Choose three.)
A. ping
B. tracert
C. ipconfig
D. show ip route
E. winipcfg
F. show interfaces
Answer: A, D, F
Explanation: There are a number of commands that can be used to troubleshoot connectivity problems on a
router. The ping command verifies connectivity, the show ip route command shows a great deal of information
that is useful for troubleshooting connectivity, and the show interfaces command displays statistics for the
network interfaces on the router.
Incorrect Answers:
B is incorrect; tracert is not a valid command. The Cisco command is trace.
C and E are incorrect; these are great Microsoft troubleshooting commands but they are not valid Cisco
commands.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 124, 107-110, and 406-
407.