Netgear WG121 User Manual download pdf (Page 59)

User Manual for the NETGEAR 54 Mbps Wireless USB 2.0 Adapter WG121

Wireless Networking Basics B-5

Figure 4-4: 802.11 shared key authentication

Overview of WEP Parameters

Before enabling WEP on an 802.11 network, you must first consider what type of encryption you

require and the key size you want to use. Typically, there are three WEP Encryption options

available for 802.11 products:

1. Do Not Use WEP: The 802.11 network does not encrypt data. For authentication purposes, the

network uses Open System Authentication.

2. Use WEP for Encryption: A transmitting 802.11 device encrypts the data portion of every

packet it sends using a configured WEP Key. The receiving 802.11b device decrypts the data using

the same WEP Key. For authentication purposes, the 802.11b network uses Open System

Authentication.

3. Use WEP for Authentication and Encryption: A transmitting 802.11 device encrypts the data

portion of every packet it sends using a configured WEP Key. The receiving 802.11 device

decrypts the data using the same WEP Key. For authentication purposes, the 802.11 network uses

Shared Key Authentication.

Note: Some 802.11 access points also support Use WEP for Authentication Only (Shared Key

Authentication without data encryption).

INTERNET LOCAL

ACT

12345678

LNK

LNK/ACT

100

Cable/DSL

ProSafeWirelessVPN SecurityFirewall

MODEL

FVM318

PWR TEST

WLAN

Enable

Access Point (AP)1) Authentication

request sent to AP

2) AP sends challenge text

3) Client encrypts

challenge text and

sends it back to AP

4) AP decrypts, and if correct,

authenticates client

5) Client connects to network

802.11 Authentication

Shared Key Steps

Cable or

DLS modem

Client

attempting

to connect

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