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̈ Chapter 11: Wireless LAN – WLAN LANCOM Reference Manual LCOS 3.50
207
Wireless LAN – WLAN
̈ Larger Wireless LANs, connection to LANs with one or more base stations
(infrastructure network)
̈ Connecting two LANs via a direct radio link (point-to-point mode)
̈ Connecting of devices with Ethernet interface via base stations (client
mode)
̈ Extending an existing Ethernet network with WLAN (bridge mode)
̈ Multiple radia cells with one access point (Multi-SSID)
Application examples:
̈ Setting-up of an Internet access for WLAN clients
̈ Passing-through of VPN-encrypted connections with VPN pass-through
The ad-hoc mode
When two terminals are equipped with compatible wireless interfaces, they
both can communicate directly via radio. This simplest use is the so-called ad-
hoc mode.
Only in IEEE
802.11b or IEEE
802.11g standard
In ad-hoc networks you connect two or more PCs with own wireless interfaces
directly together for building a Wireless LAN.
This operation mode is generally called peer-to-peer network (spontaneous
network). PCs can immediately get in touch and exchange data.
The infrastructure network
By use of one or more base stations (also called access point), a Wireless LAN
becomes more comfortable and more efficient. A Wireless LAN with one or
more base stations is referred to as an infrastructure network in Wireless LAN
terminology.
Interesting applications arise for the Wireless LAN from the LAN connection
of base stations: