ZyXEL Communications P660HN-Fx User Manual
Chapter 6 Wireless
ADSL Series User’s Guide
119
6.7 Technical Reference
This section discusses wireless LANs in depth. For more information, see the appendix.
6.7.1 Additional Wireless Terms
The following table describes some wireless network terms and acronyms used in the ZyXEL
Device’s web configurator.
Device’s web configurator.
6.7.2 Wireless Security Overview
By their nature, radio communications are simple to intercept. For wireless data networks, this
means that anyone within range of a wireless network without security can not only read the data
passing over the airwaves, but also join the network. Once an unauthorized person has access to
the network, he or she can steal information or introduce malware (malicious software) intended to
compromise the network. For these reasons, a variety of security systems have been developed to
ensure that only authorized people can use a wireless data network, or understand the data carried
on it.
means that anyone within range of a wireless network without security can not only read the data
passing over the airwaves, but also join the network. Once an unauthorized person has access to
the network, he or she can steal information or introduce malware (malicious software) intended to
compromise the network. For these reasons, a variety of security systems have been developed to
ensure that only authorized people can use a wireless data network, or understand the data carried
on it.
These security standards do two things. First, they authenticate. This means that only people
presenting the right credentials (often a username and password, or a “key” phrase) can access the
network. Second, they encrypt. This means that the information sent over the air is encoded. Only
people with the code key can understand the information, and only people who have been
authenticated are given the code key.
presenting the right credentials (often a username and password, or a “key” phrase) can access the
network. Second, they encrypt. This means that the information sent over the air is encoded. Only
people with the code key can understand the information, and only people who have been
authenticated are given the code key.
Apply
Click Apply to save your changes.
Cancel
Click Cancel to restore your previously saved settings.
Table 24
Network Setting > Wireless > Scheduling
LABEL
DESCRIPTION
Table 25
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.
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 ZyXEL Device. The lower the
value, the more often the devices must get permission.
sometimes get permission to send information to the ZyXEL 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 ZyXEL
Device.
wireless devices never have to get permission to send information to the ZyXEL
Device.
Preamble
A preamble affects the timing in your wireless network. There are two preamble
modes: long and short.
modes: long and short.
If a device uses a different preamble mode than the ZyXEL
Device does, it cannot communicate with the ZyXEL Device.
Authentication
The process of verifying whether a wireless device is allowed to use the wireless
network.
network.
Fragmentation
Threshold
Threshold
A small fragmentation threshold is recommended for busy networks, while a larger
threshold provides faster performance if the network is not very busy.
threshold provides faster performance if the network is not very busy.