Originally posted by: jonmullen
Originally posted by: vinsma
switches = router.
switches is like a smart router, knows which computer to send packet to instead of sending to all connections on network.
I switch does not by any means = a router. A switch at best is like a smart hub. That allows for 100mbps instead of 10. A router on the other hand routes several clients through a single connection. This is usually done throught the use of NAT. So in other words please dont hand out advice if you dont know what you are talking about since a switch is not by any means a router.
A switch is similar to a hub in that they both take packets and spit them out on different ports. But a hub is a layer 1 device, which means it just retransmits the electrical signals without regard to any content in the packet. A basic switch is a layer 2 device that examines the MAC address in the packet and only spits it out to the port that the destination machine is known to be attached to.
A router can route several clients over a single IP through NAT (Network Address Translation. Which is what most SOHO routers do. Other routers (Cisco 2600 for example) connect seperate networks or subnets together.
Oh, and to answer the question:
If your university doesn't limit the number of machines and a room, and their dhcp server will hand out ips to any machines that request them you can just buy a switch or hub and three cat-5 cables. Make sure they're not crossovers or rollovers.
Connect your machines to the switch in any non-uplink spots (if your switch isn't autosensing) and connect to the plug on the wall with a straight through connected to the uplink port on your switch.
If they do limit the number of machines in a dorm, buy a cheap router, and three straight through cables. Connect your machines to the LAN ports on the router, and connect the WAN port to the wall plate with a straight through cable. You may have to spoof/clone the MAC address of one of your machines in order for your university's dhcp server to give your router an ip.