You want to use a terminal emulation program to terminal into a series of Cisco routers. You will be managing these devices remotely. What protocol should you use?

If a terminal emulation program is used and the devices should be reotely managed, then you should use the Telnet protocol. Telnet is a simple, text-based network protocol that is used for accessing remote computers over TCP/IP networks like the Internet. It allows the user access to a text terminal and all its applications such as command-line for example.