The SV841HDIE 8 Port Rack Mount USB PS/2 Digital IP KVM Switch offers cost-effective and secure, local and remote administration of up to 8 systems over a LAN or the Internet. Unlike software solutions that work through the operating system, this IP KVM Switch delivers BIOS level control, full boot processes interaction and control over a TCP/IP connection as if you are on site. Featuring support for security protocols such as SSH, SSL and RADIUS, and a configurable firewall for added protection. A scalable KVM solution supporting up to 8 directly-connected computers, or cascade with other KVM switches for control of up to 64 computers. For added control, using the RPORT module (sold separately) lets you interact with any device that uses an RS-232 serial terminal (routers, switches, etc.). Backed by a StarTech.com 3-year warranty and free lifetime technical support. The SV841HDIE only works with specific 2-in-1 VGA and USB cables (sold separately), a list of StarTech.com approved cables are below: 6 ft Ultra Thin USB VGA 2-in-1 KVM Cable6 ft Ultra Thin USB VGA 2-in-1 KVM Cable10 ft Ultra Thin USB VGA 2-in-1 KVM Cable15 ft Ultra Thin USB VGA 2-in-1 KVM Cable