A local area network is an interconnection of network devices within a small geographical area, like a floor in a building, a building in a company premises, the entire company premises etc. An traditional LAN is a connection of these devices using cables.
A swing from the conventional or traditional local area network is the WLAN or wireless local area network. The WLAN is a LAN network, which does not only use cabled connections between devices, but also wireless access point with other wireless devices.
The WLAN uses an access point to interconnect devices for communication. Unlike the ethernet cable LAN, it uses the CSMA/CA for transmission and avoidance of packet collision.