KVM switches come in many different variations, but all allow keyboard, mouse and video control of a computer.
KVM
over IP stand alone units and KVM over IP Switches are designed to
enable remote access to computers and servers across a LAN/WAN, the
Internet or even ISDN/56K modem. Adder KVM Over IP devices also enable
out of band management enabling remote power cycling and BOIS level
access to remote locations or within a data center. Adder KVM Over IP
devices are jointly designed with Real VNC.
Multi user switches allow multiple concurrent users to connect to target devices (PC, Mac, Sun etc) at the same time.
Single
User KVM switch is designed to enable KVM access to a selected target
device (PC, Mac, Sun etc). The term single user is used because the
switch is designed to support one user at a time.
Multiscreen KVM switch expands the horizons of computer control by adding multiple monitor support to an advanced KVM switch.