Re: Wireless net connection
in many routers nowadays, you can also setup a unique wireless encryption key which are like passwords...you then plug those keys into said computers on your network through the network setups. Should be enough protection right there; I mean who's really gonna stand there and try to scan through to find your key? (as they are 40 or 64-bit hexadecimal)...
For me personally, I live on a single dead-end street well outside of any real busy traffic, so my protection is fairly low...obviously if you're in a much higher traffic area or city, it's good to be aware just in case.
The only way your speeds may be altered/slowed at times on a wireless network is if other units utilize the same frequency (cordless phones used to be notorious for this), or if your house is huge and you're well on the opposite end of where your router is, etc. These problems though aren't on a regular basis and mileage will vary from setup to setup.