Cisco Certified Network Associate (CCNA) Practice Exam

Which command displays the status of Frame Relay PVCs?

1. #show frame-relay pvc

2. #show frame-relay lmi

3. #show frame-relay map

4. #debug frame-relay lmi

The correct answer is: #show frame-relay pvc

The command that displays the status of Frame Relay PVCs is indeed correct. Using the command "show frame-relay pvc," you can see the details and operational status of the permanent virtual circuits configured on a Frame Relay interface. This command provides important information such as the PVC status (up or down), the local and remote DLCIs (Data Link Connection Identifiers), and the number of incongruities with the Frame Relay subnet. It's a crucial command for network troubleshooting and verification to ensure that your PVCs are functioning properly. The other commands mentioned serve different purposes. For example, the command that checks the LMI (Local Management Interface) provides information on the signaling between the router and the Frame Relay switch, rather than the PVC status itself. The mapping command is intended for viewing how Layer 3 addresses are mapped to Layer 2 addresses, which does not directly show the operational state of the PVCs. Lastly, the debug command is typically used for real-time analysis and troubleshooting of Frame Relay LMI messages, but it does not display the PVC status in a straightforward manner like the first command does.