Verify Encapsulation Type for Frame Relay Link

A

The correct answer is A. show frame-relay map.

Explanation:

Frame Relay is a layer 2 WAN protocol that provides a way to connect multiple sites together over a service provider's network. When configuring Frame Relay, you need to specify the encapsulation type, which can be either Cisco or IETF.

To verify the encapsulation type for a Frame Relay link, you can use the show frame-relay map command. This command displays the mapping between local DLCIs and remote IP addresses. It also shows the encapsulation type for each DLCI.

Here is an example output:

csharpCopy code
R1# show frame-relay map Serial0/0 (up): ip 10.1.1.2 dlci 102(0x66,0x1860), dynamic,               broadcast, CISCO, status defined, active 

In this example, the CISCO keyword indicates that the encapsulation type is set to Cisco. If the encapsulation type were set to IETF, the output would display IETF instead of CISCO.

The other options listed in the question are not correct:

• B. show frame-relay pvc displays the status of all PVCs (permanent virtual circuits) configured on a Frame Relay interface, but it does not show the encapsulation type.
• C. show frame-relay lmi displays the LMI (Local Management Interface) status and parameters, but it does not show the encapsulation type.
• D. show interfaces serial displays the status and configuration of a serial interface, but it does not show the encapsulation type for a Frame Relay link.