Cisco Certified Network Associate (CCNA) Practice Exam

What command is used to verify the encapsulation type for a Frame Relay link?

1. #show interface

2. #show frame-relay status

3. #show frame-relay map

4. #verify frame-relay encapsulation

The correct answer is: #show frame-relay map

The command that is used to verify the encapsulation type for a Frame Relay link is #show frame-relay map. This command displays information about the Frame Relay configuration on the router, including the mapping of Layer 3 addresses to Layer 2 addresses. It reveals the encapsulation type currently in use—either IETF or Cisco—and provides a view of the virtual circuit information, which is essential for troubleshooting and verifying the proper operation of the Frame Relay network. While the #show interface command provides a variety of details about the interface itself, including status, protocol, and various counters, it does not specifically focus on the encapsulation type for Frame Relay. Instead, it presents a broader scope of information. The #show frame-relay status command offers insights into the operational status of a Frame Relay interface, such as the DLCI and the status of the interface, but it does not give details about the encapsulation type in a manner specific to the mapping of the addresses. The command #verify frame-relay encapsulation does not exist as a valid command in Cisco IOS and thus would not yield any results regarding encapsulation verification. Therefore, #show frame-relay map stands out as the key command for confirming the encapsulation type for Frame Relay links