Netgear Wg111v2 WG111v2 User Manual - Page 61

User Manual for the NETGEAR 54 Mbps Wireless USB 2.0 Adapter WG111 802.11 Authentication Shared Key Steps 1) Authentication request sent to AP 2) AP sends challenge text Client 3) Client encrypts attempting challenge text and to connect sends it back to AP Access Point (AP) Cable/DSL ProSafeWirelessVPN Security Firewall PWR TEST IN TER N ET LNK W LA N LO CA L MODEL FVM318 100 ACT Enable LNK/ACT 1 2 3 4 5 6 7 8 Cable or DLS modem 4) AP decrypts, and if correct, authenticates client 5) Client connects to network Figure 4-2: 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). Wireless Networking Basics B-5 202-10026-01