1864: James Clerk Maxwell proved the existence of electromagnetic waves 1887 Heinrich Hertz sent and received wireless waves, using a spark transmitter 1920: Marconi discovers short wave radio, with wavelengths between 10 and 100 meters. The first wireless LAN was created in at the University of Hawaii in 1971.
What is Wi-Fi? Wi-Fi is stands for wireless fidelity. Requirement of Wi-Fi is mostly in Network Adapters, USB Adapters, internal and external antennas, all kinds of Access points. A Wireless Adapter translates data into a radio signal and transmits it using an antenna. A router receives the signal and decodes it. The router sends the information to the Internet using a physical wired Ethernet connection.
Theterm Wi-Fi, first used commercially in August 1999, was coined by a brand- consulting firm called interbrand Corporation that the Alliance had hired to determine a name that was "a little catchier than IEEE 802.11b Direct Sequence"
SPEED OF WI-FI wi-fi network use radio technology to transmit and receive the data at a high speed. (1) 802.11 (2) 802.11a (3) 802.11b (4) 802.11g (5) 802.11n
A and B is 10mbps and G is 54mbps And Upcoming N is 300mbps to get speed on your internet connection.
HOW TO WIFI NETWORK WORK? The wi-fi of basic concept is same as walkie-talkies. wi-fi hotspot is created by installing and access point to and internet connection when wi-fi enabled devices encounters a hotspots the devices can than connect to that net-work wirelelissly a single access point can support up to 30-users and can function within a range of 100-150 feet indoors and up to 300 feet outdoor. many access point can be connected to each other via Ethernet cable to create a single large network.
1.Wireless PCI Network Card Network card that plugs into a PCI slot on your computers motherboard. Also available as PCMCIA cards for use in laptops PDA or laptop to connect to your PC to share files or an Internet connection
2.A roof-mounted Wi-Fi antenna A Wi-Fi enabled device such as a personal computer, video game console, Smartphone or digital audio player can connect to the Intetnet when within range of a wireless network connected to the Internet. The coverage of one or more (interconnected) access points — called hotspots can comprise an area as small as a few rooms or as large as many square miles. Coverage in the larger area may depend on a group of access points with overlapping coverage. Wi- Fi technology has been used in wireless mesh networks, for example, in London, UK. In addition to private use in homes and offices, Wi-Fi can provide public access at Wi-Fi hotspots provided either free-of-charge or to subscribers to various commercial services. Organizations and businesses - such as those running airports, hotels and restaurants - often provide free- use hotspots to attract or assist clients.
3.Wireless Network Access Point Allow machines to connect onto a network to share resources such as a Broadband Internet connection and a printer. If looking for an access point. access point-: the ap is the wireless LAN transceiver or" base connection" that connect one or more wireless devices simultaneously to the internate.
4.Laptop Wi-Fi cards These are PCMCIA cards that slide into a special slot on many laptops, adding wi-fi connectivity to laptops. wi-fi card-:they accept the wireless signal and relay information they can be internal and external.
WHERE IS USE OF Wi-Fi? Offices Homes Industries Hospitals Hotels/ restaurants Banks IT companies
ADVANTAGES & DISADVANTAGES FOR Wi-Fi The some advantages of Wi-Fi is mobility,ease of installation,costly,speed, secure,flexibility. The disadvantages of Wi-Fi is limited range and high power consumption.
ADVANCE VERSION OF Wi-Fi Wi-MAX is the Advance version of Wi-Fi. Wi-MAX is the providing the more security and range compare to Wi-Fi. Wi-MAX stands for the Worldwide Interoperability Microwave Access.
BLUETOOTH Bluetooth wireless technology is a short-range radio technology. Bluetooth wireless technology makes it possible to transmit signals over short distances between telephones, computers and other devices and thereby simplify communication and synchronization between devices. The Bluetooth wireless technology comprises hardware, software and interoperability requirements. Transmits at up to 1 Mbps over a distance of 33 feet and is not impeded by physical barriers
WI-FI V/S BLUETOOTH Bluetooth is the shortes range of wireless communication up to 10Fit. Where Wi-Fi is the largest range to wireless communicate . Bluetooth is get data to transfer speed is 1.0mbps where Wi-Fi get data transfer speed up to 802.11a to 802.11n. Now a days Wi-Fi is the best use for people better than Bluetooth.