Introduction
A Wireless Local Area Network (WLAN) serves the same purposes as a conventional
wired Ethernet network (LAN) but only without the wires. Computers are linked
together by radio waves. The wireless adaptor is your “wireless network card”.
It turns your computer into a wireless station, allowing it to connect to other
wireless stations or wireless access points to share network resources including
Internet access.
THIS PRODUCT CAN BE SET UP ON TWO TYPES OF WIRELESS NETWORKS
1. Infrastructure network
In an infrastructure network, your wireless adaptor connects your computer
to a wired network via a wireless access point. This enables your computer
to share all available resources including Internet access and peripherals on
the wired network.
2. Ad-hoc (peer to peer) network
This is a computer network consists of wireless stations. Your wireless adaptor
connects your computer to other wireless stations for file sharing.
WIRELESS PRIVACY
Privacy is an important issue with wireless. These functions are provided for
access control and security:
1. Service Set ID (SSID)
SSID is the wireless network domain name. You must set your wireless adaptor
to the SSID of the wireless network you wish to join. This is similar to a network
login name. Certain access points provide basic protection by hiding the SSID.
You are expected to enter the correct SSID before joining the network.
2. Wired Equivalent Privacy (WEP) is an authentication algorithm that protects
users from eavesdropping. When enabled, all wireless stations transmit data
encrypted using a predetermined key. The receiving station will use the same
key for decryption. It is recommended that WEP is only used for backward
compatibility with legacy equipment.
3. Advanced security WPA (Wi-Fi Protected Access) and 802.1x
These are more robust security mechanisms than WEP. Both WPA and 802.1x
require a separate RADIUS server for authentication. But home users generally
do not have access to RADIUS servers. A “special home mode” of WPA known
as WPA-PSK can be used. This allows users to manually enter a password,
known as Pre-Shared Key or PSK to connect.
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