KVM is the controlling equipment, which is the shortened form of keyboard, video and mouse. It can control several computers with one set of keyboard, video and mouse. The official name of the KVM is multi-computer switcher, and the application field has already extended to serial device, e.g. HUB, Routers, storage device, UPS,etc.  It’s surely that by using the exact KVM solutions, many users can visit thousands of servers and net equipment at any time and place.