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Will a wireless router work on its own or are other components needed? I am interested in getting a wireless router so I don't have wires and cables all over my room. If I buy a wireless router, is that all I need to get it working or do I have to get a PCI card as well? What is a wireless USB adapter? Will that work alone with the router or just the router? Confused!! Also what is the difference between B-G and N routers?
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In the future please create your own topic and not post in topics that haven't had any posts in more than a couple months. I've split your question off from that thread and created a new one for you. It'll help get more views from the members here

brianaxa wrote:Will a wireless router work on its own or are other components needed? I am interested in getting a wireless router so I don't have wires and cables all over my room. If I buy a wireless router, is that all I need to get it working or do I have to get a PCI card as well? What is a wireless USB adapter? Will that work alone with the router or just the router? Confused!! Also what is the difference between B-G and N routers?

No, a wireless router will not work on its own, you need wireless adapters on each computer you wish to connect to it wirelessly (well, the router will work, your computers just won't be able to connect to it). PCI, USB or whatever other slot you have open is fine.

802.11b is limited to 11mbps, 802.11g is limited to 54mbps (108mbps in "turbo boost" or whatever terminology specific manufacturers use). Both B and G work in the (somewhat congested) 2.4 GHz spectrum. I'm not sure what the theoretical maximum for 802.11n (draft) is, but from product pages, it looks to be around 300mbps. 802.11n (draft) can work in both the 2.4 GHz and 5 GHz spectrum. Be careful when shopping for 802.11n routers, though. Not all of them support both frequencies, or even if they do, not all of them can work in both frequencies at the same time.

If you have a laptop you will be able to connect to it since wireless is built in to the laptop. at the start you will want to plug a system directly into the router to configure it (and secure it)