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show cdp neighbors


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Q11. Your internet work consists entirely of Cisco devices. You have given a command "show cdp neighbors". In the response, you get "S" under the head "Capability". What does the letter "S" mean?

A. It means "Source Route Bridge"

B. It means "Host"

C. It means "Switch"

D. It means "Static"

  Correct Answer: C



The command "show CDP neighbors" displays all the neighboring devices connected and their capability. Several capability codes are:
R - Router 
H - Host
T - Trans Bridge
B - Source Route Bridge 
r - repeater
S - Switch

This command "show CDP neighbors" displays the following:
1. Neighbor Device ID : The name of the neighbor device;
2. Local Interface : The interface to which this neighbor is heard
3. Capability: Capability of this neighboring device - R for router, S for switch, H for Host etc.
4. Platform: Which type of device the neighbor is. (2500 router or anything else)
5. Port ID: The interface of the remote neighbor you receive CDP information
6. Holdtime: Decremental hold time in seconds

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