KVM consoles and extenders separate where a computer sits from where it is used: rack consoles that fold a screen and keyboard into one rack unit, KVM extenders that put a machine's console in another room over category cable or IP, and the multi-user systems that let operators reach many machines from one desk.
Extenders are specified by resolution, distance, and what must travel alongside the video - USB peripherals, audio, and touch all depend on the model, not the category. For racks, a console drawer pays for itself the first time a server needs hands-on attention without dragging a crash cart through the room. IP-based systems trade point-to-point simplicity for reach and multi-user access, and they lean on the network they run over. Match endpoints to the machines' actual video outputs before ordering, since server video connectors lag desktop fashion by years. COLAMCO quotes KVM and console hardware for business, government, and education server rooms and control positions.