QUOTE (crahak @ Jul 25 2008, 10:25 PM)

Wireless will also be affected by 2.4GHz cordless phones if you have any, as well as things like using your microwave. And it increases transfer times being slower (noticeable on larger files, nor for things like browsing web pages). It works great for certain things like using a laptop around the house, but for desktops there's no point really.
That is, if you want to keep things as cheap as possible. Am I wrong in thinking that Wireless-N (or Pre-N) hardware operates at a frequency not affected by these household devices? I remember being at a Cisco seminar and the rep was speaking about how they had a wireless technology that was available and operated outside the range that affects 802.11b.
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Ok one more ? Can someone tell me what would be a good switch to use and like as for the ports one how many and so on. If you know what I mean.
How many ports is up to you. If you are running wires through walls, you are going to want to plan ahead for future expansion. But if you aren't being so creative then you can get anything you want. So let's say you have 6 computers, you'd probably want a 8 port switch. They typically come in standard sizes, like 4, 8, 12, 16, 24, etc. But its not just your computers. You are going to run a setup like this:
Cable/DSL Modem -> router -> switch
The router can handle your wireless machines, like notebooks or whatever else. So all your hardlines connect into the switch, and you need to do a +1 because one cable will go to the router too. So an 8 port switch would work fine with 6 wired computers + a switch.
As far as the brand goes, try to stick to a popular brand (they have better support and warranties) such as Linksys, 3Com or Netgear. You'll want a 10/100 speed (sometimes called auto-sensing) switch because the ports in the modem won't be higher than 100, and you probably aren't getting internet service anywhere near 10. It doesn't matter if you have newer computers with a gigabit NIC in them, unless you are going to be doing heavy file transfers a lot. Also, make sure you are looking at a switch and NOT a hub. They are different, and they will be labelled as such on the box, especially if you get one of the brands I listed above. So here's a summary
10/100 Switch, with at least 2 more ports than you are going to need, and made by Linksys, 3Com or Netgear.