NETGEAR WPN111 user manual WEP Keys, Bit WEP

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User Manual for the NETGEAR RangeMax™ Wireless USB 2.0 Adapter WPN111

2.The access point sends challenge text to the station.

3.The station uses its configured 64-bit or 128-bit default key to encrypt the challenge text, and sends the encrypted text to the access point.

4.The access point decrypts the encrypted text using its configured WEP Key that corresponds to the station’s default key. The access point compares the decrypted text with the original challenge text. If the decrypted text matches the original challenge text, then the access point and the station share the same WEP Key and the access point authenticates the station.

5.The station connects to the network.

If the decrypted text does not match the original challenge text (i.e., the access point and station do not share the same WEP Key), then the access point will refuse to authenticate the station and the station will be unable to communicate with either the 802.11 network or Ethernet network.

WEP Keys

The IEEE 802.11 standard supports two types of WEP encryption: 64-bit and 128-bit. 128-bit encryption is stronger than 64-bit encryption, but 128-bit encryption may not be available outside of the United States due to U.S. export regulations.

64-bit WEP

The 64-bit WEP data encryption method, allows for a five-character (40-bit) input. Additionally, 24 factory-set bits are added to the forty-bit input to generate a 64-bit encryption key. (The 24 factory-set bits are not user-configurable). This encryption key will be used to encrypt/decrypt all data transmitted via the wireless interface. Some vendors refer to the 64-bit WEP data encryption as 40-bit WEP data encryption since the user-configurable portion of the encryption key is 40 bits wide.

When configured for 64-bit encryption, 802.11 products typically support up to four WEP Keys. Each 64-bit WEP Key is expressed as 5 sets of two hexadecimal digits (0-9 and A-F). For example, “12 34 56 78 90” is a 40-bit WEP Key.

128-bit WEP

The 128-bit WEP data encryption method consists of 104 user-configurable bits. Similar to the forty-bit WEP data encryption method, the remaining 24 bits are factory set and not user configurable. Some vendors allow passphrases to be entered instead of the cryptic hexadecimal characters to ease encryption key entry.

W ire le ss N e tworkin g B a sics

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Contents NETGEAR, I n c Technical Support FCC Information to User Ta n d a rd s Teste d to C om p lyContents Troubleshooting Index Viii Audience, Scope, Conventions Chapter About This ManualHow to Print this Manual Chapter Introduction Key FeaturesAbout the WPN111 What’s in the Box? Road Map for ‘How to Get There From Here’To le a rn a b ou t wire le ss On n e ct to a E n tify th e Wire le ss n e tworkWire le ss Wire le ss n etworkRowse r su ch a s Ctiva te m yVe rify m y n e twork Ca b le or D S L se rvice Twork Con n e ction Rovid e rs For you r ve rsion of W in d owsIgh b orh ood Wire le ss a n dTwork Con n e ct to th e wire le ss Wire d n etwork E P C I a m u sin g toD P rin t S h a rin g Wire le ss a n d Com p u te r su p p ort grou p sCom b in e d Twork n e e d s to b eWhat You Need Before You Begin Chapter Basic SetupVerifying System Requirements Observing Location and Range Guidelines Two Basic Operating ModesBasic Installation Instructions WPN111 Default Wireless Configuration SettingsClick Install Driver and Utility For Windows XP Users Installing a WPN111Sta llS h ie ld W iza rd With a W in d ows X P L ogo te stin g V1 typ eOrt, you Is 1 4 M b p s wh e re a s th eSte p s, click th e H e lp b u tton in th e W P N 1 1 Th e se202-10076-01 N 1 1 1 R e sou rce C D Sta llS h ie ld W iza rd For Windows 2000 Users Installing a WPN111Sp e e d is 1 Ou n d N e w H a rd wa re W iza rdOrt is 4 8 0 M b p s N 1 1 1 S yste m Tra y I con Tility Interpreting the LED on the WPN111 WPN111 Wireless Connection IndicatorsOr re se t Interpreting System Tray Icon Colors Understanding the Configuration Options Chapter ConfigurationUsing Configuration Profiles How to Configure an Infrastructure Mode Profile Connecting to an Access Point in Infrastructure ModeRun the WPN111 Configuration Utility Save your settings in a Profile Configure the wireless Network settingsHow to Configure an Ad-hoc Mode Profile Connecting to Another PC in Ad-hoc ModeVerify wireless connectivity to your network Windows Run program dialog box Configure the PC network settingsPing test results How to Start a Computer-to-Computer Ad-Hoc NetworkEnabling Wireless Security Features Configure the Security settings How to Configure WEP Encryption SecurityHow to Configure WPA-PSK Encryption Security Advanced Security StatisticsAdvanced Settings Advanced Settings202-10076-01 Basic Tips Chapter TroubleshootingGeneral Questions Frequently Asked QuestionsNew Hardware Wizard appears after installation has completed Rou b le s h ootin g Appendix a Technical Specifications Ch n ica l S p e cifica tion s Wireless Networking Overview Appendix B Wireless Networking BasicsInfrastructure Mode Network Name Extended Service Set Identification Essid Ad Hoc Mode Peer-to-Peer WorkgroupWireless Channels 802.11b/g Wireless Channels W for E u rop e Re qu e n cy G H z 5 5 2 5 5 2For U S For C a n a d aWPN111 user can use thirteen channels in non-turbomode 152 Wireless Security Overview160 Cisco Leap WEP AuthenticationWEP Overview 802.1xAuthentication Open System Steps Bit WEP WEP KeysWEP Key Configuration How to Use WEP Parameters802.1x Port Based Network Access Control Figure B-4 802.1x authentication WPA Wireless Security How Does WPA Compare to WEP? How Does WPA Compare to Ieee 802.11i? What are the Key Features of WPA Security?Figure B-5 WPA Overview Figure B-6 WPA/802.1x Authentication Sequence 202-10076-01 Temporal Key Integrity Protocol Tkip WPA Data Encryption Key ManagementMichael Product Support for WPA Is WPA Perfect?AES Support Wireless network adapters Wireless client programs 202-10076-01 Preparing Your Computers for TCP/IP Networking Appendix C Preparing Your PCs for Network AccessConfiguring Windows 98 and Me for TCP/IP Networking Install or Verify Windows Networking ComponentsRe p a rin g Y ou r P C s for N e twork a cce ss Enabling Dhcp in Windows 98 and Me Choose Settings, and then Control PanelLocate your Network Neighborhood icon Primary Network Logon is set to Windows logon Verifying TCP/IP Properties Selecting Windows’ Internet Access MethodConfiguring Windows 2000 or XP for TCP/IP Networking Dhcp Configuration of TCP/IP in Windows XP Dhcp Configuration of TCP/IP in Windows XP orTCP/IP details are presented on Support tab Verify that Obtain an IP address Dhcp Configuration of TCP/IP in WindowsObtain an IP address automatically is selected Verifying TCP/IP Properties for Windows XP or 202-10076-01 Glossary DSL Internet service provider Ssid Wins 202-10076-01 Numerics Index
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