Which of the following is NOT a typical network device?

A keyboard is not a typical network device because it serves as an input device for users to interact with computers or systems rather than facilitating communication within or between networks. In a networking context, devices like routers, modems, and servers play critical roles in connecting devices, routing traffic, and providing resources respectively.

Routers direct data traffic between networks, modems connect a network to the internet by converting signals, and servers host applications, services, and files for users to access over a network. While keyboards are essential for user interaction and input, they do not directly participate in network operations or data transmission, which distinguishes them from the typical components involved in networking infrastructure.