ZyAIR G-220 User’s Guide

The following figure depicts a roaming example. When wireless station B moves to position X, the ZyAIR in wireless station B automatically switches the channel to the one used by access point 2 in order to stay connected to the network.

Figure 2-5 Roaming Example

2.2Wireless LAN Security

Wireless LAN security is vital to your network to protect wireless communications.

Configure the wireless LAN security using the Configuration or the Profile Security Settings screen. If you do not enable any wireless security on your ZyAIR, the ZyAIR’s wireless communications are accessible to any wireless networking device that is in the coverage area.

2.2.1 Data Encryption with WEP

WEP (Wired Equivalent Privacy) encryption scrambles all data packets transmitted between the ZyAIR and the AP or other wireless stations to keep network communications private. Both the wireless stations and the access points must use the same WEP key for data encryption and decryption.

There are two ways to create WEP keys in your ZyAIR.

•Automatic WEP key generation based on a “password phrase” called a passphrase. The passphrase is case sensitive. You must use the same passphrase for all WLAN adapters with this feature in the same WLAN.

For WLAN adapters without the passphrase feature, you can still take advantage of this feature by writing down the four automatically generated WEP keys from the Security Settings screen of the ZyXEL Utility and entering them manually as the WEP keys in the other WLAN adapter(s).

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Wireless LAN Network