Yes that is the purpose of routers. It's stores the IP address provided by your ISP and assigns it's own IP addresses to each PC connected to it.
Hub - Each PC needs it's own IP address. Can be provided by your ISP or by a router.
Switch - Each PC needs it's own IP address which would be provided by your ISP.
Router - Uses ISP IP address and assigns IP addresses to each PC directly connected to it or connected to it thru a hub.
If you are only talking about 2 to 4 PC's, a 4 port router is all you need.
Chas
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