LANCOM 1811n Wireless – LANCOM 1821n Wireless
Chapter 1: Introduction
11
EN
Apart from that, wireless LANs can also be used for connections over longer
distances. Expensive leased lines and the associated construction measures
can be saved.
LANCOM Wireless Routers and LANCOM Access Points can be opera-
ted either as self-sufficient Access Points with their own configuration
(WLAN modules in "Access Point mode“) or as components in a WLAN
infrastructure, which is controlled from a central WLAN-Controller
("managed mode").
Split management can be used to separate the WLAN configuration
from the rest of the router configuration. This allows router settings
and VPN settings to be adjusted locally, for example in a branch office
or home office installation, and the WLAN configuration is regulated
by a LANCOM WLAN Controller at the main office.
Please observe the corresponding notices to this in this documenta-
tion or in the LCOS reference manual.
1.1.1
Modes of operation of wireless LANs and access points
Wireless LAN technology and access points in wireless LANs are used in the
following modes of operation:
Simple, direct connection between terminal devices with an access point
(ad-hoc mode)
Extensive wireless LANs, possibly connected to a LAN, with one or more
access points (infrastructure network)
Transmission of VPN-encrypted connections with VPN pass through
Establishing access to the Internet
Connecting two LANs over a wireless link (point-to-point mode)
Connecting devices with an Ethernet interface via an access point (client
mode)
Extending an existing Ethernet network with a wireless LAN (bridge mode)
Central administration using a LANCOM WLAN Controller
1.2
Wireless LANs in accordance with 802.11n
The new wireless LAN standard IEEE 802.11n—ratified as „WLAN Enhance-
ments for Higher Throughput“ in september 2009—features a number of
