Correct Answer: D
The command that displays directly connected Cisco neighbors, their local interface, remote interface, platform, and capability information is show cdp neighbor. CDP is Cisco Discovery Protocol, a Layer 2 discovery protocol used by Cisco devices to advertise basic identity and adjacency information to directly connected neighbors. The other choices produce completely different outputs. show ip route displays the routing table. show ip interface displays Layer 3 interface status and IP-related settings. show interface gives physical and data-link interface counters, line protocol state, errors, and bandwidth details. Cisco CCNA 200-
301 v1.1 includes discovery protocols under Network Access because engineers use CDP and LLDP to validate physical topology, switchport connections, voice-phone attachment, and neighbor device identity.
CDP is Cisco-proprietary, while LLDP is standards-based. In this question, the exhibit is neighbor-oriented rather than routing-oriented or counter-oriented, so the correct operational command is show cdp neighbor.