A Wifi network also referred to as a Wireless Fidelity network is a wide local area network technology that allows various electronic devices to connect to a network using 2.4GHz UHF and 5 GHz SHF ISM radio frequencies. To start a Wifi network connection,a user must plug in a wireless router into an Internet connection and all the necessary settings installed properly.
Recent technology advances have seen the popularity of this type of network grow and anyone can get connected from almost anywhere in restaurants,at home,at work,schools,hotels and even airports. Wireless Fidelity or 802.11 network covers the IEEE 802.11 technologies,the main advantage here being that the local area network is compatible with virtually almost all operating systems,advanced printers and gaming devices.
How a Wifi network works
Like handsets,a Wifi network uses radio waves to transfer information across a wide local areas network. Your computer should have a wireless adapter that will interpret the information sent into a radio signal. The same signal will be sent through an antenna to a decoder/router using a rp-sma extension cable. Once the data is decoded,the information will be transmitted to the Internet via a wired Ethernet connection.
Because the wireless network works in a two way traffic mode,the information received from Internet will also go via the router so as to be coded into a radio wave that will be received by your computer’s wireless adapter.
A wireless fidelity network will transmit data at a frequency of between 2.4ghz to 5ghz to acclimatize to the information that is being sent. The 802.11 standards will vary a bit depending on the user’s needs as illustrated below:
-The 802.11a transmits information at a frequency rate of 5ghz.The OFDM(Orthogonal Frequency Division Multiplexing) used improves reception by splitting the signals into small signals before they reach the router. Here a user can transmit up to 54 Megabits per second.
-The 802.11b transmits information at a frequency of 2.4ghz,which is a bit slow. Here a user can transmit up to 11 megabits per second only.
-802.11G will send data at speeds of 2.4GHz but can transmit up to 54 megabits per second because it uses OFDM coding.
-The advanced 802.11n transmits up to 140 megabits per second and uses a frequency of 5GHz.
What is a Hotspot?
Hotspot is used to refer to a specific area where Wifi network access is available. This can either be in public places like airports,restaurants or via closed network at home. As mentioned earlier,for you to access a hotspot,your device must have a wireless adapter. If you are using the more advanced laptop models,they will probably have an in built wireless transmitter. Otherwise you can buy an adapter that you will plug into the USB port or PCI slot. Once you install your computer will automatically detect the hotspot and request connection.