WHAT ARE THE COMPONENTS NEEDED TO CREATE A WIRELESS LAN (WLAN)?

In order to create a WLAN, a few basic components are required, which include the following;
1.The wireless client devices; equipped with a wireless Network Interface Card (wireless NIC)
2.The Access Points (AP) or control module
3.The wired LAN backbone

The Wireless Client Devices

PDA

Laptop PC

This simply refers to users’ devices such as desktop computer systems, laptop computers and
mobile gadgets like the Personal Digital Assistants (PDAs) and smart phones.
They have embedded wireless Network Interface Card (wireless NICs) which enables users to have access to the wireless network.
The wireless NIC is a hardware device that connects a computer to a network so as to send
and receive data. A wireless NIC has an antenna, either internal or external, while a wired
NIC has a port (usually an RJ-45 port for cable connection). The cable connects the NIC to
the network, thus establishing a link between the computer and the network.
A wireless NIC performs same functions as the wired NIC but one major exception – there is
no port for cable connection, rather an antenna is used to send and receive data in form of
Radio Frequency (RF) signals. When a wireless NIC transmits, it specifically performs the following functions;
i.    Changes the computer data from parallel to serial transmission
ii.    Divides the data into packets (small blocks of data) and attach the sending and receiving computers’ addresses
iii.    Determine when to send
iv.    Transmit the packet

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