Wi-Fi

• Wi-Fi is the standard way computers connect to wireless networks. Nearly all modern computers have built-in Wi-Fi chips that allows users to find and connect to wireless routers. 
• Most mobile devices, video game systems, and other standalone devices also support Wi-Fi, enabling them to connect to wireless networks as well. 
• When a device establishes a Wi-Fi connection with a router, it can communicate with the router and other devices on the network. However, the router must be connected to the Internet (via a DSL or cable modem) in order to provide Internet access to connected devices. Therefore, it is possible to have a Wi-Fi connection, but no Internet access.
• Since Wi-Fi is a wireless networking standard, any device with a "Wi-Fi Certified" wireless card should be recognized by any "Wi-Fi Certified" access point, and vice-versa.
•  However, wireless routers can be configured to only work with a specific 802.11 standard, which may prevent older equipment from communicating with the router.
•  For example, an 802.11n router can be configured to only work with 802.11n devices. If this option is chosen, devices with 802.11g Wi-Fi chips will not be able to connect to the router, even though they are Wi-Fi certified.