Keyboard/Video/Mouse (KVM) Switch. Linksys ProConnect 4-Port KVM Switch posted a confident win as the Best KVM Switch. The switch lets you instantly toggle between four PS/2-equipped desktop or notebook PCs while using one monitor, a PS/2 keyboard, and a PS/2 mouse. You can switch between four PCs with the press of a button. You can plug your notebook PC into the KVM switch and control it from your desktop PC's monitor, keyboard, and mouse. Best of all, the switch eliminates cable swapping and saves you valuable desktop space—as well as hundreds of dollars in hardware costs. The ProConnect KVM Switch doesn't use software, so it's compatible with all major desktop and notebook computers.