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Contents ix
April 2006
Are Login Protocols Used? ................................................................................... C-20
What Is Your Configuration Information? .............................................................. C-20
Obtaining ISP Configuration Information for Windows Computers ....................... C-21
Obtaining ISP Configuration Information for Macintosh Computers ..................... C-22
Restarting the Network ................................................................................................ C-23
Appendix D
Wireless Networking Basics
Wireless Networking Overview ...................................................................................... D-1
Infrastructure Mode ................................................................................................. D-1
Ad Hoc Mode (Peer-to-Peer Workgroup) ................................................................ D-2
Network Name: Extended Service Set Identification (ESSID) ................................ D-2
Authentication and WEP Data Encryption ..................................................................... D-2
802.11 Authentication .............................................................................................. D-3
Open System Authentication ................................................................................... D-3
Shared Key Authentication ...................................................................................... D-4
Overview of WEP Parameters ................................................................................ D-5
Key Size .................................................................................................................. D-6
WEP Configuration Options .................................................................................... D-7
Wireless Channels ......................................................................................................... D-7
WPA and WPA2 Wireless Security ................................................................................ D-8
How Does WPA Compare to WEP? ........................................................................ D-9
How Does WPA Compare to WPA2 (IEEE 802.11i)? ............................................ D-10
What are the Key Features of WPA and WPA2 Security? .................................... D-10
WPA/WPA2 Authentication: Enterprise-level User
Authentication via 802.1x/EAP and RADIUS .................................................. D-12
WPA/WPA2 Data Encryption Key Management ............................................. D-14
Is WPA/WPA2 Perfect? ......................................................................................... D-16
Product Support for WPA/WPA2 ........................................................................... D-16
Supporting a Mixture of WPA, WPA2, and WEP Wireless Clients is Discouraged D-16
Changes to Wireless Access Points ............................................................... D-17
Changes to Wireless Network Adapters ......................................................... D-17
Changes to Wireless Client Programs ............................................................ D-18
Glossary