ZyAIR G-2000 Plus User’s Guide

1.2.2.4 802.11g Wireless LAN Standard

The ZyAIR, complies with the 802.11g wireless standard and is also fully compatible with the 802.11b standard. This means an 802.11b radio card can interface directly with an 802.11g device (and vice versa) at 11 Mbps or lower depending on range. 802.11g has several intermediate rate steps between the maximum and minimum data rates. The 802.11g data rate and modulation are as follows:.

Table 2 IEEE 802.11g

DATA RATE

 

MODULATION

(MBPS)

 

 

 

 

 

 

 

6/9/12/18/24/36/48/54

 

OFDM (Orthogonal Frequency Division Multiplexing)

 

 

 

 

 

 

 

 

 

Note: The ZyAIR may be prone to RF (Radio Frequency)

 

 

interference from other 2.4 GHz devices such as microwave

 

 

ovens, wireless phones, Bluetooth enabled devices, and other

 

 

wireless LANs.

 

 

 

 

1.2.2.5 STP (Spanning Tree Protocol) / RSTP (Rapid STP)

(R)STP detects and breaks network loops and provides backup links between switches, bridges or routers. It allows a bridge to interact with other (R)STP -compliant bridges in your network to ensure that only one path exists between any two stations on the network.

1.2.2.6 Certificates

The ZyAIR can use certificates (also called digital IDs) to authenticate users. Certificates are based on public-private key pairs. Certificates provide a way to exchange public keys for use in authentication.

1.2.2.7 Limit the number of Client Connections

You may set a maximum number of wireless stations that may connect to the ZyAIR. This may be necessary if for example, there is interference or difficulty with channel assignment due to a high density of APs within a coverage area.

1.2.2.8 SSL Passthrough

SSL (Secure Sockets Layer) uses a public key to encrypt data that's transmitted over an SSL connection. Both Netscape Navigator and Internet Explorer support SSL, and many Web sites use the protocol to obtain confidential user information, such as credit card numbers. By convention, URLs that require an SSL connection start with “https” instead of “http”. The ZyAIR allows SSL connections to take place through the ZyAIR.

Chapter 1 Getting to Know Your ZyAIR

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