KVM switch
Also known as: KVM, keyboard video mouse switch, KVM over IP
A KVM switch (keyboard, video, mouse) is a device that lets one keyboard, monitor, and mouse control several computers, switching between them with a button or keyboard shortcut.
People use them to share a desk between a work laptop and a personal PC, and data centres use them to manage many servers. While software alternatives exist, KVM switches work without any setup on the computers themselves, which makes them simple and reliable.
KVM switch, explained at three levels
At home
A KVM switch is like a TV remote that switches between channels, except it switches your keyboard, mouse, and screen between different computers.
At work
KVM switches let staff use a work laptop and another computer at the same desk without a tangle of extra keyboards and screens.
At home
Choose a KVM switch that supports your monitor's resolution and refresh rate, and your connections, such as HDMI, DisplayPort, or USB-C.
At work
KVM over IP gives remote access to server consoles, including BIOS screens and boot problems. Secure them like any administration system, with strong authentication and network isolation.
At home
Software tools like Microsoft's Mouse without Borders share a mouse and keyboard across computers on the same network. In my opinion, hardware KVMs are simpler and work even when a computer is restarting.
At work
Watch for unauthorized KVM or remote-control devices on company laptops, as they can bypass endpoint controls. Secure-rated KVMs exist for environments that must keep classified and unclassified networks isolated.
Real-world examples
At home
Marcus uses his work laptop and gaming PC at the same desk. A KVM switch lets him swap his keyboard, mouse, and monitor between them with one button.
At work
Nadia runs IT for a Moncton hospital's server room. Remote KVM over IP lets her team fix servers stuck at startup without driving in at night.
How it compares
| feature | KVM switch | Docking station |
|---|---|---|
| Purpose | Several computers, one set of controls | One laptop, many accessories |
| Computers supported | Two or more | One |
| Charges laptops | Rarely | Usually |
| Common use | Shared desks, server rooms | Hybrid work desks |
KVMs share controls between computers. Docks expand one laptop.
For analysts
In remote access reviews, I'd include KVM over IP devices. They provide powerful low-level access and are easy to forget in security inventories.
History & origin
KVM switches emerged in the 1980s and 1990s as companies ran rooms full of servers and wanted to avoid buying a monitor and keyboard for each one. Companies such as Apex and Cybex grew around the market, and IP-based KVM switches later let administrators control servers remotely over a network, even before the operating system loaded. Desktop KVMs gained popularity with hybrid work after 2020, as people shared desks between work and personal computers. Low-cost open-source projects such as PiKVM made remote KVM affordable. In 2024 and 2025, US prosecutors described North Korean IT worker schemes using 'laptop farms' and KVM devices to remotely control company laptops, a reminder that remote access hardware can be misused. In my view, a KVM switch is a small purchase that tidies a desk enormously.