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What are two reasons a network administrator would use CDP (Choose two.)()。
A.
to verify the type of cable interconnecting two devices
B.
to determine the status of network services on a remote device
C.
to obtain VLAN information from directly connected switches
D.
to verify Layer 2 connectivity between two devices when Layer 3 fails
E.
to obtain the IP address of a connected device in order to telnet to the device
F.
to determine the status of the routing protocols between directly connected routers