How Wireless LAN Works?

What is a wireless LAN?
A collection of two or more devices connected via an open-air medium in order to share data.
Types of Wireless LAN
Ad Hoc Network: A wireless network composed only of stations without access points1." This type of network can be used anywhere. There are very few requirements for this to work. This could potentially be the most dangerous of all wireless networks. Since this type of network is going to be setup on the fly when two people want to share data it is more probable that less consideration is going to be placed on security.
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