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正确答案DE
