CCNA 200-125 Exam: Troubleshooting Questions With Answers
Question 1. Which interface counter can you use to diagnose a duplex mismatch problem?
A. runts
B. CRC errors
C. no carrier
D. late collisions
E. deferred
F. giants
Question 2. Refer to the exhibit. The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem? (Choose three)
A. Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.
B. Ensure that cables A and B are straight-through cables.
C. Ensure cable A is plugged into a trunk port.
D. Ensure the switch has power.
E. Reboot all of the devices.
F. Reseat all cables.
Question 3. What are reasons that duplex mismatches can be difficult to diagnose? (Choose two)
A. The interface displays a connected (up/up) state even when the duplex settings are mismatched.
B. 1-Gbps interfaces are full-duplex by default.
C. Full-duplex interfaces use CSMA/CD logic, so mismatches may be disguised by collisions.
D. The symptoms of a duplex mismatch may be intermittent.
E. Autonegotiation is disabled.
Question 4. What are two reasons that duplex mismatches can be difficult to diagnose? (Choose two)
A. The interface displays a connected (up/up) state even when the duplex settings are mismatched.
B. The symptoms of a duplex mismatch may be intermittent.
C. Autonegotiation is disabled.
D. Full-duplex interfaces use CSMA/CD logic, so mismatches may be disguised by collisions.
E. 1-Gbps interfaces are full-duplex by default.
Question 5. What is the best way to verify that a host has a path to other hosts in different networks?
A. Ping the loopback address.
B. Ping the default gateway.
C. Ping the local interface address.
D. Ping the remote network.
Question 6. While you were troubleshooting a connection issue, a ping from one VLAN to another VLAN on the same switch failed. Which command verifies that IP routing is enabled on interfaces and the local VLANs are up?
A. show ip interface brief
B. show ip nat statistics
C. show ip statistics
D. show ip route
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