I have used quite a few different brands of KVM switches with different ports from 2 to 24 ports. I like using ATEN products but they are quite expensive so I had to look for another manufacturer like Belkin or IOGEAR. Since there's no problem using both, I tried using IOGEAR, which seemed like a pretty good deal. It works great with no problems. The ability to use a PS2 cable or a USB cable on the same KVM switch is another reason I went with this option.
TESmart 1080P 60Hz USB VGA KVM Extender Over Cat5e Cat6 Ethernet Cable - Long Range 984ft/300m (Sender+Receiver)
10 Review
4 Port USB 3.0 Switch Selector - Pubioh KVM Switch for Mouse, Keyboard, Printer, Scanner - 2 in 4 Out Sharing Box with Switch Button and 2 USB 3.0 A to A Cables
11 Review
CKL 4 Port KVM Switch Dual Monitor DisplayPort 4K 60Hz: Unprecedented Multi-Computer Control with Audio, USB 2.0 HUBS, and DP 1.2
11 Review
🔁 TRENDnet TK-803R: 8-Port Rack Mount KVM Switch with VGA & USB Connection, USB/PS2 Support, Device Monitoring, Auto Scan - Control 8 Computers/Servers
10 Review