What Is A Wireless Lan; Which Hardware To Use; Operation Modes Of Wireless Lans And Base Stations - Lancom 1811 User Manual

LANCOM 1811 Wireless DSL – LANCOM 1821+ Wireless ADSL
Chapter 1: Introduction
The resulting savings and high flexibility makes the Internet (or any other IP
network) an outstanding backbone for a corporate network.
1.3

What is a Wireless LAN?


A Wireless LAN connects single terminals (e.g. PCs or notebooks) to a local
network (also LAN – Local Area Network). In contrast to a conventional LAN,
communication takes place via radio links rather than via network cables. This
is the reason why a Wireless LAN is also called a Wireless Local Area Network
(WLAN).
All functions of a cable-bound network are also available in a Wireless LAN:
access to files, servers, printers etc. is as possible as the connection of individ-
ual stations to an internal mail system or to the Internet access.
The advantages of Wireless LANs are obvious: notebooks and PCs can be set
up just where they are needed. Due to Wireless LANs, problems with missing
connections or structural alterations belong to the past.
1.3.1

Which hardware to use?

Each station of the Wireless LAN needs access to the Wireless LAN in the form
of a wireless interface. Devices which have no built-in wireless interface can
be upgraded with a supplement card or an adapter.

1.3.2

Operation modes of Wireless LANs and base stations

Wireless LAN technology and base stations in Wireless LANs are used in the
following operation modes:
14
The following sections describe the functionality of wireless networks
in general. The functions supported by your device are listed in the
table 'What can your LANCOM Wireless Router do?'
LANCOM Systems offers wireless adapters by its AirLancer product
line. An AirLancer wireless adapter enables a device (e.g. PC or note-
book) for access to the Wireless LAN.
Simple direct connections between terminals without base station (ad-
hoc mode)
Larger Wireless LANs, connection to LANs with one or more base stations
(infrastructure network)
Passing-through of VPN-encrypted connections with VPN pass-through
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