
Overview of the SCALANCE WLC711 Solution
Conventional Wireless LANs
SCALANCE WLC711
1-2 C79000-G8976-C260-03, 07/2012, User Guide, V8.11
Conventional Wireless LANs
Wireless communication between multiple computers requires that each computer be equipped
with a receiver/transmitter—a WLAN Network Interface Card (NIC)—capable of exchanging
digital information over a common radio frequency. This is called an ad hoc network
configuration. An ad hoc network configuration allows wireless devices to communicate together.
This setup is defined as an independent basic service set (IBSS).
An alternative to the ad hoc configuration is the use of an access point. This may be a dedicated
hardware bridge or a computer running special software. Computers and other wireless devices
communicate with each other through this access point. The 802.11 standard defines access point
communications as devices that allow wireless devices to communicate with a distribution
system. This setup is defined as a basic service set (BSS) or infrastructure network.
To allow the wireless devices to communicate with computers on a wired network, the access
points must be connected to the wired network providing access to the networked computers.
This topology is called bridging. With bridging, security and management scalability is often a
concern.
Figure 1-1 Standard Wireless Network Solution Example
The wireless devices and the wired networks communicate with each other using standard
networking protocols and addressing schemes. Most commonly, Internet Protocol (IP) addressing
is used.
RADIUS
Authentication
Server
DHCP Server
Ethernet Router/Switch
Wireless AP Wireless AP
Ethernet
Wireless Devices
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