The KVM switch of Lenovo notebook is the abbreviation of Keyboard, Video and Mouse, and its official name is multi-computer switch. Simply put, it is a set of keyboard, monitor and mouse that can control 2, 4, 8, 16 or even more than 4096 computer hosts. The type mainly refers to the terminal type controlled by the KVM switch. If the terminal mainly controls computers, it can be called a multi-computer control type. The field of KVM has also expanded to serial port devices, such as hubs, routers, storage devices and UPS. Sophisticated KVM solutions allow multiple users to access thousands of servers and network devices from anywhere, at any time. Moreover, features such as event logging, remote power management, multi-level user rights security management, environmental warning system, Cat5 cables, etc. help IT managers manage daily operations securely from any location they wish. Can easily access, monitor and manage all IT equipment. It's called Total Data Center Management (TDCM). It is a kind of centralized management that can increase the normal operation time of IT equipment (because it can reduce the time of access and diagnosis), save considerable floor space and unnecessary equipment and manpower, and can access all information without considering the efficiency of the network. equipment, which can ultimately enhance business competitiveness.