Additional Wireless Terms; Wireless Security Overview - ZyXEL Communications P-870HN-5xb User Manual

Chapter 7 Wireless LAN
• Every device in the same wireless network must use security compatible with
the AP.
Security stops unauthorized devices from using the wireless network. It can also
protect the information that is sent in the wireless network.

7.10.2 Additional Wireless Terms

The following table describes some wireless network terms and acronyms used in
the Device's Web Configurator.
Table 38 Additional Wireless Terms
TERM
RTS/CTS Threshold
Preamble
Authentication
Fragmentation
Threshold

7.10.3 Wireless Security Overview

The following sections introduce different types of wireless security you can set up
in the wireless network.
7.10.3.1 SSID
Normally, the Device acts like a beacon and regularly broadcasts the SSID in the
area. You can hide the SSID instead, in which case the Device does not broadcast
the SSID. In addition, you should change the default SSID to something that is
difficult to guess.
136
DESCRIPTION
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
Device. 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 Device.
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 Device does, it cannot communicate with
the Device.
The process of verifying whether a wireless device is allowed to use
the wireless network.
A small fragmentation threshold is recommended for busy networks,
while a larger threshold provides faster performance if the network
is not very busy.
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