Wifi stands for Wireless Fidelity. Wifi is a wireless networking technology that uses high frequency. Frequencies used by WIFi technology currently on the 2.4 GHz spectrum. We can connect to the internet with Wifi using a notebook and a PDA equipped with a WiFi card (WiFi card). If we use the notebook processor incorporates Centrino Mobile technology, the WiFi card is not required. By using WiFi, you can access the Internet quickly. WiFi has the ability to access the internet at speeds up to 11 Mbps. We do not need a cable to connect kejaringan WiFi. However, we must be on areas that have WiFi signal. Areas that have a WiFi signal is a zone located at a radius of 100 meters from the access point that is often called a hotspot. There are three kompunen contained in a hotspot location, among others, as follows: 1. Access pint (access point) is a device that connects to the Ethernet LAN Wireless technologies contained in the computer. The access point has the ability to serve users as many as 128 people. The area can be reached by an access point reaches 25-1000 meters. 2. Access controller (access controller) is a device that serves as an authentication tool to check whether a user is a person who has the right or permission to access. 3. Internet link is a device that connects to the internet hotspot locations. Internet link has kemamuan speed Internet connection up to 512 kbps. The ability of these connections are used to serve all users in a single location. The downside of internet access with WiFi access can only be done in the area as far as 100 m from the access point, and until now, only certain places that have been fitted with the access point. Certain places are usually campuses, hotels, cafes, airports and other public places.