Medium-Range Wireless Communication: Wi-Fi & Hotspots
Medium-Range wireless networks are same as wireless Local area network i.e. abbreviated as WLANs. Some of the most common type of Medium-Range Wireless networks are Wi-Fi or wireless fidelity and Hotspots. In this page we are going to discuss some of the Medium-Range Wireless networks and tell you about how the communication done in such networks.
Wi-Fi stands for Wireless Fidelity is a medium-range wireless network which is same like a wired LAN without cables. This is type of the wireless technology that connect user to internet at the frequency of 2.4Ghz or 5Ghz providing minimal interference with cellphones, broadcast radio, TV antenna and two-way radios radio are seen during transmission. It works over long distance as compared to Bluetooth or infrared and is also a low power retiring technology which make it portable and use along with laptops and other portable devices. Wi-Fi is rule by Wi-Fi Alliance which is a responsible for manufacturers and regulators defining standards and certify products as Wi-Fi compatible.
Now understand how Wi-Fi works, it works with no physical wired connection between sender and receiver by using radio frequency technology which sometimes known as RF technology having a frequency of electromagnetic spectrum associated with radio wave propagation. When transmission take place RF current is supplied to an antenna, an electromagnetic field is created that is able to propagate through space. The essential key element of any wireless network is an access point (AP) which is used to broadcast a wireless signal that computers can detect and tune with it. Computers and devices must be equipped with wireless network adapters to connect to access points. There are many different standards of Wi-Fi which are providing different speed and power. One of the earliest standard was 802.11b which is slowest and costly too. Then it was upgraded to 802.11a and 802.11g both of the upgraded standards includes technology for splitting radio signal and reduce interference. One of the latest version of Wi-Fi is 802.11ac which comes after 802.11n.
Advantages of Wi-Fi
Convenience in terms of wireless nature that allow user to access network from any nearest location within networking environment which can be your home or office or any shopping complex. Mobility in terms of emergence of public wireless network so that user can access the internet from the outside of the normal work environment it can be in coffee shop if they are offering wireless connection to their customers. Productivity in terms of business which implies an employee can be more productive as he can do his work from any convenient location. Low Cost in terms of saving wired cost and labour to manage the associated physical wired for a single network which is also not going to provide wide range. Expandability in terms of having capability to sudden increase number of clients with the existing network.
Hotspot identify a specific location that provides Internet access via Wireless LAN or in other words we can say a network that creates a hotspot includes a modem and wireless router. This term is generally same as Wi-Fi connection. RF waves sent by the wireless network that dispersed in different direction from one centralized location and the signals become weaker as they travel further from central location due to interference. Hotspots basically is of two types Free Wi-Fi hotspots and Commercial hotspots. Free Wi-Fi hotspot is wi-fi router which require no password and allow user in range to access internet from the same network. Whereas commercial hotspot are the access points provide wireless coverage for a free. When user using commercial hotspot to connect to internet then he redirected to a screen requesting login information that are neutered by the user who using it.
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