ccna 640-802 s2-2/5@13/791

QUESTION NO: 2
CDP is running between two TestKing devices. What information is supplied by
CDP? (Select three)
A. Device Identifiers
B. Capabilities list
C. Platform
D. Route identifier
E. Neighbor traffic data

Answer: A, B, C
Explanation:
CDP is a Cisco proprietary protocol; to support forwarding CDP messages over an interface,
that interface must support SNAP headers. Any LAN interface, HDLC, Frame Relay, and ATM
all support CDP. The router or switch can discover Layer 3 addressing details of neighboring
routers--without even configuring that Layer 3 prorocol--because CDP is not dependent on
any particular Layer 3 protool.

CDP discover several useful details from the neighbor device:
*Device Identifier--Typically the hot name.
*Address lisr--Network and data link address.
*Port Identifier--Text that identifies the port, which is another name for an interface.
*Capabilities list--Information on what the device does--for instance, a router or switch.
*Platform--The model and OS level running in the device.