What is IEEE 802.11 Wireless LAN (WLAN) Technology?

Last modified : Feb 27. 2018

The Wireless local area network (WLAN) protocol, IEEE 802.11, and associated technologies, such as the 802.11X protocol, allow a secure high-speed wireless network and mobile access to the network infrastructure.

 

 

Some of the Wireless LAN Technologies are shown in the figure below:

IEEE

 

Some benefits of implementing WLAN as follows:


●  Wireless connections can extend or replace a Wired infrastructure:
The wiring-free aspect of wireless LAN networking is very attractive as you can connect various computers in your home together without having to drill holes and pull network cables through walls and ceilings.


●  Increased productivity for the mobile employee:
The mobile user whose primary computer is a portable computer can change location and always remain connected to the network. This enables the mobile user to travel to various places, i.e., meeting rooms, hallways, lobbies, cafeterias, classrooms, and so forth.
 
●  Easy access to the Internet in public places:
Beyond the corporate workplace, access to the Internet and even corporate sites can be made available through public wireless “hot spot” networks.

Layout of WLAN infrastructure

Some of the requirements for a secure WLAN are as follows:


●  A standard TCP/IP network environment.
●  Active Directory, to store account properties and validate password-based credentials.
●  Remote Authentication Dial-In User Service (RADIUS) support, to provide centralized connection authentication, authorization, and accounting.
●  A certificate infrastructure, also known as a public key infrastructure (PKI)  for authenticating the user of a wireless client computer or Smartphones etc..

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