Wi-Fi is a way for wireless devices to communicate. Wi-Fi, short for wireless Fidelity, is the Wi-Fi Alliance’s name for a wireless standard, or protocol, used for wireless communication. Wiring an office or a building for a local area network is often a difficult and costly task. Older building frequently do not have coaxial cables or additional twisted-pair wire.
Working of Wi-Fi Network
A wireless network uses radio waves for transmission. In fact, communication across a wireless network is a lot like two-way radio communication. Following are the steps in wireless communication
1) A computer’s wireless adapter translates data into a radio signal and transmits it using an antenna.
2) A wireless router receives the signal and decodes it. The router sends the information to the internet using a physical, wired Ethernet connection.
Use of Wi-Fi
1) The use of wireless LAN is growing rapidly as new high-speed technologies are implemented. A
2) A prime ex. Is a new open-standard wireless radio-wave technology technically known as IEEE 802.11b, or more popularly as Wi-Fi.
3) Wi-Fi is faster (11Mbps) and less expensive than standard Ethernet and other common wire-based LAN technologies. Thus, Wi-Fi wireless LANs enable laptop PCs, PDAs, and other devices with Wi-Fi modems to connect easily to the internet and other networks in a rapidly increasing number of business, public and home environments.
4) A faster version (802.11g) with speeds of 54 Mbps promises to make this technology even more widely used.
Requirement for a Wi-Fi Network
1) Network adapters
A network adapter is the interface between a computer and a network. In a wireless network, the adapter contains a radio transmitter that sends data from the computer to the network and a receiver that’s detects incoming radio signals that contain data from the network and passes it along to the computer.
USB adapters is a USB port can be used to plug-in the wireless USB adapter that is best way for connecting the computer to the wireless network.
2) Access Point
A Wi-Fi access point broadcast the wireless internet connectivity to wireless devices. most wireless network interface adapters perform just one function they exchange data between computer and a network.
3) Internal and external antennas
Many access points and most wireless network adapter come with captive antennas. For most users, in most situations, those built-in antennas will send and receive a strong, clean data stream between an access point and nearby computer.
