What are two reasons a network administrator would use CDP? (Choose two.)
A.
to obtain VLAN information from directly connected switches
B.
to determine the status of network services on a remote device
C.
to determine the status of the routing protocols between directly connected routers
D.
to verify the type of cable interconnecting two devices
E.
to verify Layer 2 connectivity between two devices when Layer 3 fails
F.
to obtain the IP address of a connected device in order to telnet to the device
Explanation:
Cisco Discovery Protocol (CDP) is primarily used to obtain protocol addresses of neighboring
devices and discover the platform of those devices. CDP can also be used to show information
about the interfaces your router uses. CDP is an independent media protocol and runs on all
Cisco-manufactured devices including routers, bridges, access servers, and switches. It should be
noted that CDP is a protocol which works on the layer2. By default, multicast advertise is sent
every 60 seconds to 01-00-0 c-cc-cc-cc as the destination address . When reaching the holdtime
of 180 seconds , if not receiving the advertise from neighboring devices yet, the information of
neighboring devices will be cleared.
Cisco Discovery Protocol (CDP) is a proprietary protocol designed by Cisco to help administrators
collect information about both locally attached and remote devices. By using CDP, you can gather
hardware and protocol information about neighbor devices, which is useful info for troubleshooting
and documenting the network.
You can use:
Show cdp neighbor
Show cdp neighbor details
Commands to gather the information of connected neighbors.