單項選擇題Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?()

A. TestKingB> telnet
B. TestKingB > ping
C. TestKingB > trace
D. TestKingB > show ip route
E. TestKingB > show interface
F. TestKingB > show cdp neighbors


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2.單項選擇題While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface to be?()

A. Serial 0 is up, line protocol is up
B. Serial 0 is up, line protocol is down
C. Serial 0 is down, line protocol is down
D. Serial 0 is down, line protocol is up
E. Serial 0 is administratively down, line protocol is down
F. Serial 0 is administratively down, line protocol is up

3.單項選擇題

There is a connectivity problem between the serial 0/0 interface of router TESTKING1 and the serial 0/0 interface of TESTKING2. A leased line point to point circuit is installed between these two routers. The output from the "show interface serial 0/0" command is displayed below for each of these routers:

From your observations of the above exhibit, what is the underlying cause of the problem?()

A. The loopback is not set.
B. The serial cable is faulty.
C. The subnet mask is not configured properly.
D. The IP address is not configured properly.
E. The Layer 2 frame types are not compatible.
F. The keepalive setting is not configured properly.

4.單項選擇題

The relevant configuration files for the TestKing1 and TestKing2 routers are displayed below:
With due consideration to the command outputs, which of the following reasons would you attribute the connectivity problem between the two routers?()

A. The authentication needs to be changed to PAP for both routers.
B. The serial IP addresses of routers are not on the same subnet.
C. The username/password combination is incorrectly configured.
D. The router names are incorrectly configured.

5.單項選擇題What kind of message does a PING send out to test connectivity?()

A. ICMP echo request
B. Information interrupt request
C. Timestamp reply
D. Source quench
E. None of the above

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