does a router do the same job as a hub

A router and serve internet well; is used for gaming, and networking. While is hub is mostly for data, as it only copies informatin, compared to a router, which relays.
 
A router is a device to connect two networks together. In the case of most consumer routers, WAN(IE the internet) and LAN(your network) Routers also have the capability to connect to the internet without a computer. For example, it can make a DSL modem connect to the net without needing a computer to enter the password and such. Also, most routers have a switch built into them. THis allows you to connect multiple computer to it similar to a hub(or a plain switch)

A hub is simply used to connect many computers together with no additional featuers. Also, it isn't as fast as a switch, which, as I said, is commonly in a router.
 
www.linksys.com has a flash tour. Go to their site>Put your mouse over learning center>Go to basic networking>Launch the flash tour. You'll have to get similar things because liksys.com is down right now. You may have to wait a while to get there.
 
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