Whilst it is very liberating to un-tether from an ethernet cable you are introducing a whole raft of security issues to your network. There are many people who buy a wireless router from a retailer, install it onto their existing ADSL modem and leave access open to anyone. This is an especially great way to share your family photo connection with the neighbours, have someone rack up massive download usage and possibly your internet provider bill.
If you have concerns about the security issues that arise from the installation of a wireless router the first thing to check is that you are using WPA or WPA2 encryption. If you need a hand with your home or office network please contact us and we can book a time to have a look at it for you and help sort it out.