Preamble Type - ZyXEL Communications NBG6503 User Manual

If the Fragmentation Threshold value is smaller than the RTS/CTS value (see previously) you
set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames
will be fragmented before they reach RTS/CTS size.

Preamble Type

Preamble is used to signal that data is coming to the receiver. Short and long refer to the length of
the synchronization field in a packet.
Short preamble increases performance as less time sending preamble means more time for sending
data. All IEEE 802.11 compliant wireless adapters support long preamble, but not all support short
preamble.
Use long preamble if you are unsure what preamble mode other wireless devices on the network
support, and to provide more reliable communications in busy wireless networks.
Use short preamble if you are sure all wireless devices on the network support it, and to provide
more efficient communications.
Use the dynamic setting to automatically use short preamble when all wireless devices on the
network support it, otherwise the Router uses long preamble.
Note: The wireless devices MUST use the same preamble mode in order to communicate.
Wireless Security Overview
Wireless security is vital to your network to protect wireless communication between wireless
clients, access points and the wired network.
Wireless security methods available on the Router are data encryption, wireless client
authentication, restricting access by device MAC address and hiding the Router identity.
The following figure shows the relative effectiveness of these wireless security methods available on
your Router.
Table 82 Wireless Security Levels
SECURITY
LEVEL
Least
Secure
Most Secure
Note: You must enable the same wireless security settings on the Router and on all
wireless clients that you want to associate with it.
NBG6503 User's Guide
SECURITY TYPE
Unique SSID (Default)
Unique SSID with Hide SSID Enabled
MAC Address Filtering
WEP Encryption
IEEE802.1x EAP with RADIUS Server Authentication
Wi-Fi Protected Access (WPA)
WPA2
Appendix C Wireless LANs
213