Wi-Fi is abbreviated into Wireless Fidelity which follows IEEE 802.11 standards and a registered trademark of the Wi-Fi Alliance.
Any device can use Wi-Fi technology might include personal computers, video-game consoles, smartphones, cameras, tablet, audio players, and printers. These devices connect to the Internet via a WLAN network. Such Hotspots has a range of 30 meters indoors and even a border range outdoors.
Some people misspells Wi-Fi with the alternative spellings like wifi, WIFI, WiFi.
How Wi-Fi Works
Wi-Fi networks have no physical wired connection between sender and receiver by using radio frequency (RF) technology. Any wireless network works using an access point. For any computer or a device in order to connect and communicate with an Access Point, it must be equipped with a wireless network adapter.
Now through Wi-Fi, all the devices in the local area network can communicate through the access point within the network.
How to set up Wi-Fi
In order to set up a Wi-Fi connection follow this simple steps.
- Find the wireless icon on the system tray (Unfamiliar with the icon? Most probably looks like a computer symbol.)
- View the Available Wi-Fi networks by making a Right Click > View Available Wireless Networks. Tap on Connect or Disconnect.
- Choose the network to connect Find the available networks by clicking the “Connect” button.
- Enter the security Key Since it has wireless security which is encrypted with WEP, WPA, and WPA2. A Passphrase and password are given to be stored to easier access until next time.
- Type of Network – Select the network type – Home, Work or Public if you are using a windows system you will be automatically prompted.
Infrastructure Mode – In this mode, all the clients that are present within the current range of the Wireless Access Point can connect and communicate in the network.
Ad-hoc Mode – Wi-Fi allows clients to connect directly to each other without the use of an access point.
Hardware used in Wi-Fi
A Wireless Broadband routers are used as access points in home networks. Small Wi-Fi antennas are placed inside smartphones, laptops, printers to enable them to function as network clients.
Every Access Points can be configured with network names that may be visible to the client to discover and connect to it when searching for available networks in the area.
Any products that are tested and approved as “Wi-Fi Certified” can use any access point with any brand of client hardware so this indicates that radio frequency band used is 2.5GHz for 802.11b, 802.11g, or 802.11n, and 5GHz for 802.11a.
Security– Due to no Physical connection, it is very much vulnerable to any brute attack on the connection than a wired ethernet connection.
Signal Range – Basic Wi-FI network Access point range is less than 100m. In order to expand the range, we will be needing access points configured to communicate. Like any other wireless protocol signal Interference from any obstructions such as walls can lower the effective Wi-Fi range.
Health Concerns – Back in 2007 UK’s Health Protection Agency reported, ” the same amount of radiation from a 20-minute mobile phone call” after exposure to Wi-Fi for any year.