What is this wi fi in computers and how it works?

Answer 1

Wi -Fi is meaning that the wireless enablity in a computer or in a laptop. when a laptop have a wireless enable built in function which most laptop have, the network connection listing in the functions as 802.11a/b/g. these various alphabet means the different type of connection speed and especially the b/g, it means that it can be backwards compatible. when the connection is a B or G, it is compatible. however in the A network , it is not compatible to be a roll back function. it will specifically need a A network wireless card if the connection router is A netwrork version. however in the technology of today, most places uses the B/G network. therefore there is no need to worry about the compatibility and most laptop uses this network compatibilty. older laptop that does not have a wireless card in bult, they can buy an external wireless card. this is something that even desktop computers that want to use wirelesss will need to buy. to break down into simpler steps, the laptop is able to use a USB wireless adapter or wirelesss network PCMCIA . for desktop is USB wireless adapter or PCI version,

Answer 2

Wi Fi is the Wireless Internet. It connects throught D-Link Cards
And Require Wireless Routers And Sattelite Connections

Answer 3

History:

WiFi stands for wireless fidelity. Wifi was intended to be used for mobile computing devices, such as laptops, but is now often used for increasingly more applications, including Internet and VoIP phone access, gaming, and basic connectivity of consumer electronics such as televisions and DVD players. There are even more standards in development that will allow Wi-Fi to be used by cars in highways in support of an Intelligent Transportation System to increase safety, gather statistics, and enable mobile commerce IEEE 802.11p.

How it Works:

The typical Wi-Fi setup contains one or more Access Points (APs) and one or more clients. An AP broadcasts its SSID (Service Set Identifier, "Network name") via packets that are called beacons, which are broadcast every 100 ms. The beacons are transmitted at 1 Mbit/s, and are of relatively short duration and therefore do not have a significant influence on performance. Since 1 Mbit/s is the lowest rate of Wi-Fi it assures that the client who receives the beacon can communicate at least 1 Mbit/s. Based on the settings (e.g. the SSID), the client may decide whether to connect to an AP. Also the firmware running on the client Wi-Fi card is of influence. Say two APs of the same SSID are in range of the client, the firmware may decide based on signal strength to which of the two APs it will connect. The Wi-Fi standard leaves connection criteria and roaming totally open to the client. This is a strength of Wi-Fi, but also means that one wireless adapter may perform substantially better than the other. Since Wi-Fi transmits in the air, it has the same properties as a non-switched ethernet network. Even collisions can therefore appear like in non-switched ethernet LAN's.

Answer 4

this might help you
http://computer.howstuffworks.com/wireless-network.htm