User manual ZYXEL M-302

[. . . ] M-302 802. 11g Wireless MIMO PCI card User's Guide Version 2. 00 Edition 1 4/2006 M-302 User's Guide Copyright Copyright © 2006 by ZyXEL Communications Corporation. The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. Published by ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. [. . . ] This field displays the network standard (802. 11b or 802. 11g) of the AP or peer computer. This field displays the total number of data frames transmitted. This field displays the total number of data frames received. This field displays the quality of the signal of the M-302. This field displays whether data encryption is activated (WEP (WEP or 802. 1x), TKIP (WPA/WPA-PSK), AES (WPA/WPA-PSK)) or inactive (Disable). This field displays the radio channel the M-302 is currently using. 36 Chapter 4 ZyXEL Utility Configuration M-302 User's Guide Table 5 Link Info (continued) LABEL Trend Chart Signal Strength DESCRIPTION Click this button to display the real-time statistics of the data rate in kilobits per second (Kbps). The status bar shows the strength of the signal. The signal strength depends mainly on the antenna output power and the distance between the M-302 and the AP or peer computer. The status bar shows the quality of the wireless connection. This refers to the percentage of packets delivered successfully. If there are too many wireless stations in a wireless network, collisions may occur which could result in a loss of messages even though you have high signal strength. Link Quality 4. 2. 1 Trend Chart Click Trend Chart in the Link Info screen to display a screen as shown below. Use this screen to view real-time data traffic statistics. Figure 21 Link Info: Trend Chart The following table describes the labels in this screen. Table 6 Link Info: Trend Chart LABEL Transmit Receive DESCRIPTION This field displays the current data transmission rate in kilobits per second (Kbps). This field displays the current data receiving rate in kilobits per second (Kbps). 4. 3 The Site Survey Screen Use the Site Survey screen to scan for and connect to a wireless network automatically. Chapter 4 ZyXEL Utility Configuration 37 M-302 User's Guide Figure 22 Site Survey The following table describes the labels in this screen. Table 7 Site Survey LABEL Available Network List DESCRIPTION Click a column heading to sort the entries. denotes that the wireless device is in infrastructure mode and the wireless security is activated. denotes that the wireless device is in infrastructure mode but the wireless security is deactivated. denotes that the wireless device is in Ad-Hoc mode and the wireless security is activated. denotes that the wireless device is in Ad-Hoc mode but the wireless security is deactivated. SSID Channel Signal Scan Connect Site Information Network Type Network Mode Channel This field displays the SSID (Service Set IDentifier) of each wireless device. This field displays the channel number used by each wireless device. This field displays the signal strength of each wireless device. Click Scan to search for available wireless devices within transmission range. Click Connect to associate to the selected wireless device. [. . . ] WPA regularly changes and rotate the encryption keys so that the same encryption key is never used twice. The RADIUS server distributes a Pairwise Master Key (PMK) key to the AP that then sets up a key hierarchy and management system, using the PMK to dynamically generate unique data encryption keys to encrypt every data packet that is wirelessly communicated between the AP and the wireless stations. This all happens in the background automatically. Appendix C 75 M-302 User's Guide The Message Integrity Check (MIC) is designed to prevent an attacker from capturing data packets, altering them and resending them. The MIC provides a strong mathematical function in which the receiver and the transmitter each compute and then compare the MIC. [. . . ]