CCNA 640-802 Exam Practice Questions
show interface, show protocol commands

Q12. You want to verify the encapsulation type being used at Data Link layer for interface s0. Which command can you use?

A. Sh ip protocol

B. sh int s0

C. sh ip interface

D. sh processes

Correct answer: B

Explanation:

"sh int <interface_no> " is a very useful command. It displays the following information:
1. Hardware address
2. Status of interface and the line protocol - carrier detect brings up the serial port(which means that physical layer connections are working) and keep alive bring up the line protocol (which means that Data link layer protocol is working)..
3. MTU, BW, DLY, rely, and load metrics.
4. Encapsulation type (layer 2, Data link layer) - HDLC is the default.