What is WiFi(Wi-Fi)and its Types
Wi-Fi is the name of a popular wireless networking technology or wireless file transfer system.In this technology radio waves are used to provide wireless high-speed Internet and network connections. A common misconception is that the term Wi-Fi is short for “wireless fidelity,” however this is not the case.
How WiFi Works.
Working of wi-if is very simple. A wi-fi enabled device has to parts, sender and receiver of radio waves. Radio waves are electromagnetic wave which are created by wifi enabled device.Radio waves are part of a larger group of waves classified all together as electromagnetic radiation. This large group of waves is broken down into smaller groups based upon their frequencies and wavelengths.
Wi-Fi provides wireless connectivity by emitting frequencies between 2.4GHz to 5GHz based on the amount of data on the network.We in wifi enabled device, Wi-Fi is on the the adapter convert the data into radio waves and send to the other wifi enabled device.The receiver device receive the radio waves and translate them into the data.
When a wifi enabled mobile connect with wi-fi modem and try to send an image ,mobile convert the image into radio waves and send to modem ,modem forward the waves to wifi enabled computer .computer convert the radio waves again into data and display the image.
WiFi hot sopts ?
A Wi-Fi hotspot is created by installing an access point to an internet connection.Today many of latest devices are wifi hotspot enabled. Wireless hotspot enabled device transmits a wireless signal over a short distance . Commonly covering around 300 feet. When a Wi-Fi .enabled device, such as a Pocket PC, encounters a hotspot, the device can then connect to that network wirelessly.
Benefits of WiFi
Easy To Use
The wireless nature of such networks allows users to access network resources from nearly any convenient location within their primary networking environment
Flexibility and Mobility
With the use of public wireless networks, users can access the internet even outside their normal work environment. Most chain coffee shops, offer their customers a wireless connection to the internet at no cost.
Initial setup of an infrastructure-based wireless network requires little more than a single access point. Wired networks, on the other hand, have the additional cost and complexity of actual physical cables being run to numerous locations
Wireless networks can serve a suddenly-increased number of clients with the existing equipment. In a wired network, additional clients would require additional wiring.
Disadvantage of Wifi
As we compare the disadvantages of wifi.There i some major issues with using WIFI.
- WiFi uses the unlicensed 2.4GHz spectrum, which often crowded with other devices such as Bluetooth , cordless phones , or video sender devices , and among many others. This cause degradation in performance.
- Wi Fi uses Radio signal for working .So continuously touch with radio signals cause physical disorders like cancer,skin problems.
- Use of Wifi is not as secure as local area network connection .any hacker can use your wifi with cracking your password.