DRAG DROP
Click and drag the OSI layer, on the left, to the commands at which they test functionality. If a command can test more than one layer, choose the highest layer for
which it can test. (It may be necessary to use an OSI layer multiple times.)
Select and Place:

Answer:

Explanation:
Telnet operates at the application layer, which is Layer 7 of the OSI model. File transfer Protocol (FTP) is a generic command that is also used by some high-end
Cisco routers but in a different format. FTP also operates at Layer 7. The ping command operates at the network layer, which is Layer 3 of OSI reference model.
Therefore, it is used to test the connectivity up to Layer 3. The show interface command will display the status of line protocol. If it displays the message interface
up, line protocol up it means that Layer 2 is functioning correctly.
The show cdp neighbor command also operates at Layer 2, which is the data link layer.
Objective:
Infrastructure Management
Sub-Objective:
Perform device maintenance

Cisco Documentation > Internetworking Technology Handbook > Internetworking Basics > OSI model