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Unit 7: Wireless LAN

Each AP within the BSS network provides 802.11 authentication and authorization services Notes
for access to the BSS network, as well as privacy services for the encryption of data sent
through the BSS network.
In addition, each AP can act as a bridge between the wireless and wired LANs, allowing
stations on either LAN to communicate with each other.
The following figure shows the infrastructure BSS network topology.
Figure 7.1: Infrastructure BSS network Topology

Source: http://msdn.microsoft.com/en-us/library/windows/hardware/ff556962%28v=vs.85%29.aspx
2. Independent BSS (IBSS) Networks: In this topology, all stations within the BSS communicate
directly with each other. In this situation, one station creates, or starts, the BSS network and
other stations join the BSS network
IBSS networks, which are also known as “ad hoc” networks, provide limited support for
802.11 authentication, authorization, and privacy services for the BSS network.
The following figure shows the independent BSS network topology.

Figure 7.2: Independent BSS Network Topology

Source: http://msdn.microsoft.com/en-us/library/windows/hardware/ff556962%28v=vs.85%29.aspx

7.2.1 Why Wireless?

The world around us is going wireless; we stream music and movies from our home PCs to
any room in the house, we can play music from our phones on car stereos and we can go to any
number of public places and hook up to the internet.

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