What is Wi-Fi

Wi-Fi

Wi-Fi is increasingly becoming the preferred mode of internet connection all over the world. To access this type of connection, one must have a wireless adapter on their computer. Wi-Fi provides wireless connectivity by emitting frequencies between 2.4GHz to 5GHz based on the amount of data on the network. Areas which are enabled with Wi-Fi connectivity are known as Hot Spots. One can use advanced softwares like Wirelessmon to detect and request connection to Hotspots. To start a Wireless connection, it is important that the wireless router is plugged into the internet connection and that all the required settings are properly installed. 

How does Wi-Fi work?

Like mobile phones, a Wi-Fi network makes use of radio waves to transmit information across a network. The computer should include a wireless adapter that will translate data sent into a radio signal. This same signal will be transmitted, via an antenna, to a decoder known as the router. Once decoded, the data will be sent to the Internet through a wired Ethernet connection. As the wireless network will work as a two-way traffic, the data received from the Internet will also pass through the router to be coded into a radio signal that will be receipted by the computer's wireless adapter. 

Frequencies

A wireless network will transmit at a frequency level of 2.4 GHz or 5GHz to adapt to the amount of data that is being sent by the user. The 802.11 networking standards will somewhat vary depending mostly on the user's needs, as explained below: 

1. The 802.11a will transmit data at a frequency level of 5GHz. The Orthogonal Frequency-Division Multiplexing (OFDM) used enhances reception by dividing the radio signals into smaller signals before reaching the router. You can transmit a maximum of 54 megabits of data per second. 

2. The 802.11b will transmit data at a frequency level of 2.4GHz, which is a relatively slow speed. You can transmit a maximum of 11 megabits of data per second. 

3. The 802.11g will transmit data at 2.4GHz but can transmit a maximum of 54 megabits of data per second as it also uses an OFDM coding. 

4. The more advanced 802.11n can transmit a maximum of 140 megabits of data per second and uses a frequency level of 5GHz. 

What is a Hotspot?

The term Hotspot is used to define an area where Wi-Fi access is available. It can either be through a closed wireless network at home or in public places like restaurants or airports. 

As stated earlier, to be able to access Hotspots your computer should include a wireless adapter. If you are using an advanced laptop model, it will probably include a built-in wireless transmitter already. Otherwise you can purchase a wireless adapter that will plug into the PCI slot or USB port. Once installed, your system will automatically detect the Wi-Fi hotspots and request connection. If not, you should use a software to handle this task for you.  

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