ZyXEL Communications NVG2053, User Manual

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Chapter 8 Wireless LAN
NVG2053 User’s Guide
111
8.10 Technical Reference
This section discusses wireless LANs in depth. For more information, see the
appendix.
8.10.1 Additional Wireless Terms
The following table describes some wireless network terms and acronyms used in
the NVG2053’s Web Configurator.
8.10.2 Wireless Security Overview
The following sections introduce different types of wireless security you can set up
in the wireless network.
8.10.2.1 SSID
Normally, the NVG2053 acts like a beacon and regularly broadcasts the SSID in
the area. You can hide the SSID instead, in which case the NVG2053 does not
broadcast the SSID. In addition, you should change the default SSID to something
that is difficult to guess.
Table 33 Additional Wireless Terms
TERM DESCRIPTION
RTS/CTS Threshold In a wireless network which covers a large area, wireless devices
are sometimes not aware of each other’s presence. This may cause
them to send information to the AP at the same time and result in
information colliding and not getting through.
By setting this value lower than the default value, the wireless
devices must sometimes get permission to send information to the
NVG2053. The lower the value, the more often the devices must get
permission.
If this value is greater than the fragmentation threshold value (see
below), then wireless devices never have to get permission to send
information to the NVG2053.
Preamble A preamble affects the timing in your wireless network. There are
two preamble modes: long and short.
If a device uses a different
preamble mode than the NVG2053 does, it cannot communicate
with the NVG2053.
Authentication The process of verifying whether a wireless device is allowed to use
the wireless network.
Fragmentation
Threshold A small fragmentation threshold is recommended for busy networks,
while a larger threshold provides faster performance if the network
is not very busy.