On my LAN I have 2 PCs. I networked them so I can share files and printers. Also when my dad brings home his work laptop he can plug it into the D-link, one of the few routers under $100 bucks with VPN Capability and can access his work at DSL speeds instead of the dial up junk. By the way if you dont know, VPN is called Virtual Private Networking. It is more secure and creates virtual tunnels that let only you and the remote computer get in and makes sure no backdoor trojans are on ur pc that could access the work PC.Setting it up is easy. Plug your DSL in the WAN. Then plug Computer 1 - 4 into the 1, 2, 3, & 4 places. It also has a serial port for a analog back up modem. Then visit the configeration page by typing in 192.168.0.1 into your browser and then let the wizard do the work and help you set it up.