ZyXEL Communications NWA 1121-NI -, Руководство пользователя

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Chapter 6 Wireless LAN
NWA1121-NI User’s Guide
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The following table describes the labels in this screen.
6.9 Technical Reference
This section provides technical background information about the topics covered in this chapter.
Refer to
Appendix D on page 179 for further readings on Wireless LAN.
6.9.1 Additional Wireless Terms
Table 26
Additional Wireless Terms
Table 25
Wireless LAN > MAC Filter
LABEL DESCRIPTION
Profile Name This is the name that identifying this profile.
Access Control Mode Select Disabled if you do not want to use this feature.
Select Allow to permit access to the NWA1121-NI. MAC addresses not listed will be
denied access to the NWA1121-NI.
Select Deny to block access to theNWA1121-NI. MAC addresses not listed will be
allowed to access the NWA1121-NI.
# This is the index number of the MAC address listed.
MAC Address Enter the MAC addresses (in XX:XX:XX:XX:XX:XX format) of the wireless station to be
allowed or denied access to the NWA1121-NI.
Back Click Back to return to the previous screen.
Apply Click Apply to save your changes.
Cancel Click Cancel to begin configuring this screen afresh.
TERM DESCRIPTION
Intra-BSS Traffic This describes direct communication (not through the NWA1121-NI) between two
wireless devices within a wireless network. You might disable this kind of
communication to enhance security within your wireless network.
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 NWA1121-NI. 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 NWA1121-
NI.
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
NWA1121-NI does, it cannot communicate with the NWA1121-NI.
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.