You have been hired by a small company to assist the network administrator in troubleshooting some performance issues with its network. When you arrive at the site, you ask to see the network diagrams for the network in question. The administrator informs you that he just started working at this site last month and has not been able to locate any documentation for the network. Which of the

following protocols would be useful in your efforts to re-create a network diagram?

A) ISL
B) ARP
C) CDP
D) HTTP

C
Explanation: C) The Cisco Discovery Protocol (CDP) is used to help network engineers determine the remote devices that are connected off a local device's interfaces. This can be a useful asset when attempting to troubleshoot networking issues, especially when the network is not well documented.