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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.
IEEE 802.11g Wireless LAN
IEEE 802.11g is fully compatible with the IEEE 802.11b standard. This means an IEEE 802.11b
adapter can interface directly with an IEEE 802.11g access point (and vice versa) at 11 Mbps or
lower depending on range. IEEE 802.11g has several intermediate rate steps between the
maximum and minimum data rates. The IEEE 802.11g data rate and modulation are as follows:
Table 139 IEEE 802.11g
DATA RATE (MBPS)
1
2
5.5 / 11
6/9/12/18/24/36/48/
54
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 Device are data encryption, wireless client
authentication, restricting access by device MAC address and hiding the Device identity.
The following figure shows the relative effectiveness of these wireless security methods available on
your Device.
Table 140 Wireless Security Levels
SECURITY
LEVEL
Least
Secure
Most Secure
Note: You must enable the same wireless security settings on the Device and on all
wireless clients that you want to associate with it.
SBG3500-N000 User's Guide
MODULATION
DBPSK (Differential Binary Phase Shift Keyed)
DQPSK (Differential Quadrature Phase Shift Keying)
CCK (Complementary Code Keying)
OFDM (Orthogonal Frequency Division Multiplexing)
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 D Wireless LANs
377
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