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ZyXEL G-1000 v2 User’s Guide

173

APPENDIX I

Wireless LAN Security

As wireless networks become popular for both portable computing and corporate networks,

security is now a priority.

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:

IEEE 802.1x

In June 2001, the IEEE 802.1x standard was designed to extend the features of IEEE 802.11 to

support extended authentication as well as providing additional accounting and control

features. It is supported by Windows XP and a number of network devices. Some advantages

of IEEE 802.1x are:

• User based identification that allows for roaming.

• Support for RADIUS (Remote Authentication Dial In User Service, RFC 2138, 2139) for

centralized user profile and accounting management on a network RADIUS server.

• Support for EAP (Extensible Authentication Protocol, RFC 2486) that allows additional

authentication methods to be deployed with no changes to the access point or the wireless

stations.

Table 84 IEEE 802.11g

DATA RATE (MBPS) MODULATION

1 DBPSK (Differential Binary Phase Shift Keyed)

2 DQPSK (Differential Quadrature Phase Shift Keying)

5.5 / 11 CCK (Complementary Code Keying)

6/9/12/18/24/36/48/54 OFDM (Orthogonal Frequency Division Multiplexing)

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 197 198

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