Central Collecting Point - The Base Station; Operation Modes; Ad-Hoc Network - Lancom AirLancer MC-54 Manual

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8
Introduction
1.2.2 Central collecting point – the base station
With an additional base station, a Wireless LAN becomes more comfortable
and more efficient. The base station (access point) enables a central admin-
istration of the Wireless LAN. Furthermore, with a base station you can also
connect an entire cable-bound LAN to a Wireless LAN. If the base station
contains a router, too, it can make available a ISDN or DSL a connection to
the Internet as well.
According to whether a base station is used or not in the Wireless LAN, two
different operation modes arise for a Wireless LAN: on the one hand the
ad-hoc-network (peer-to-peer), on the other the infrastructure-network
(access point).
1.3

Operation modes

We take now a separate look at both operation modes.
1.3.1

Ad-hoc network

In ad-hoc networks you connect two or more PCs with own wireless inter-
faces directly together to build a Wireless LAN. All stations in this wireless
LAN are able to communicate between each other without any further equip-
ment.
This operation mode is generally called peer-to-peer network (spontaneous
Ad-hoc-network
network). PCs can immediately get in touch and exchange data.
Ad-hoc-networks are only possible in the 2,4 GHz frequency band with
radion-LANs according to IEEE 802.11g and IEEE 802.11b. Ad-hoc-networks
are not possible in the 5 GHz frequency band according to the IEEE 802.11a
standard.
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AirLancer
ad-hoc-network