C&T Wing is the first WI-FI area in Punjab Police HQ
       
A person with a Wi-Fi device, such  as a  computer, telephone, or personal digital assistant  (PDA)  can  connect  to  the  Internet  when in proximity of an access point. The region covered by  one or several access points is called a hotspot. Hotspots can range from a single room to many  square miles of overlapping hotspots.
       

C&T wing is first to become WI-FI zone at Punjab Police HQ. Now anybody can walk in with his/her laptop and can access internet from any corner of C& T wing. After the successful launching and working of Wi-Fi in C & T Wing. The wing is already on the move to make PPHQ building a Wi-Fi zone.
       

1: Wi-fi uses antennas around which wi-fi "hotspots" are created. The hotspots are outlets equipped to receive the radiowaves that power wireless networking. Until recently, wi-fi has been confined to more than 10,000 hot-spots in cafes, bars and airport lounges. But various projects are under way to set up city-wide zones, where a series of antennas are installed in the streets, on lampposts or street signs. The hotspots around them together create a much wider area of coverage. Norwich has a mesh network which links each lamppost antenna to the next creating a seamless wi-fi hotspot around the centre of the city.

2: The source internet connection is provided by a PC or server to which the antennas are connected either wirelessly or via a cable.

3: Some mobile phones and personal digital assistants (PDA) now have wi-fi chips installed. With mobile phones, this means conventional networks can be bypassed and inexpensive long-distance calls made over the web (using Voice over Internet Protocol, VoIP).

4: Many laptops and handheld computers now come with built-in wi-fi connectivity; it is also possible to add wi-fi to your computer with a special card that plugs into a port on your laptop.
       
       

Wi-fi is the acronym for Wireless Fidelity, essentially a set of standards for transmitting data over a wireless network. Wi-fi allows you to connect to the net at broadband speeds without cables, as long as you have the right equipment and, in most cases, a regular internet service provider and a wi-fi account. To understand the technology behind wi-fi, imagine using a walkie-talkie. Your voice is picked up by a microphone, encoded onto a radio frequency and transmitted with the antenna to another walkie-talkie, which decodes your voice. Wi-fi works in broadly in the same way, but using a better radio that is capable of handling a lot more data per second.