Aironet PCI4810B Guide de l'utilisateur télécharger pdf (Page 46)

Section 2: Using the WinDGS Utilities

Using the WEPKey Utility

This section briefly explains how to use the Aironet WEP-

Key Utility to configure a WEP key on the Aironet client

card.

WEP Overview

WEP-40 and WEP-128 are optional IEEE 802.11 features

that provide data confidentiality equivalent to the confidenti-

ality of a wired LAN that does not use cryptographic tech-

niques to enhance privacy. WEP (Wired Equivalent

Privacy) makes the wireless LAN link in a system only as

secure as the wired link.

As specified in the standard, WEP uses the RC4 algorithm

with a 40-bit key for WEP-40 and a 128-bit key for WEP-

128. When WEP is enabled, each station (client and

Access Point) has a key. The key scrambles the data

before it is transmitted over the airwaves. If a station

receives a packet that is not scrambled with the appropriate

key, the station discards the packet and never delivers it to

the host.

Using WEPKey

1. Install the Aironet WEPKey Utility (along with

WinDGS and LinkScope) from the Aironet Wireless

LAN Adapter Utility disk.

2. Start the application with one of these steps:

• Double-click the WEPKey icon on the Desktop,

• From the Windows Start Menu, select Pro-

grams | Aironet | WEPKey, or

• From a DOS Window, change to the C:\Airo-

net\WinDGS directory (or to the directory you

selected when installing WinDGS) and type

wepkey.

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Aironet PCI4810B Guide de l'utilisateur Page 46