Nowadays everyone is using Wireless technology whether it is home or office.WiFi technology has become more and more popular with the introduction of Smartphones. With WiFi technology you can connect to the internet from anywhere (provided you have WiFi signal) without the need for wires or cables. Wireless technology is available only if you have a Router which is a device which receives your data packets and then sends it as radio waves. A WiFi router costs less than Rs.2000. if you just want to connect to the internet from anywhere in the home.But if you're opting to connect multiple devices and you need more signal strength, then you should buy an advanced one with 2 or more antennae which is costly. Buying a wireless router is not enough, you need to protect it from outside hackers or from your neighbors.A non-wireless modem doesn't need any protection as the signals are not broadcasted wirelessly instead they are connected through wires physically which m