Netgear Double 108 Mbps Wireless PC Card WG511U User Manual Page 67
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User’s Manual for the NETGEAR Double 108 Mbps Wireless PC Card 32-bit CardBus WG511U
Wireless Networking Basics B-15
August 2004
For 802.11, WEP encryption is optional. For WPA, encryption using Temporal Key Integrity
Protocol (TKIP) is required. TKIP replaces WEP with a new encryption algorithm that is stronger
than the WEP algorithm, but that uses the calculation facilities present on existing wireless devices
to perform encryption operations. TKIP provides important data encryption enhancements
including a per-packet key mixing function, a message integrity check (MIC) named Michael, an
extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. Through
these enhancements, TKIP addresses all of known WEP vulnerabilities.
How Does WPA Compare to IEEE 802.11i?
WPA will be forward compatible with the IEEE 802.11i security specification currently under
development. WPA is a subset of the current 802.11i draft and uses certain pieces of the 802.11i
draft that are ready to bring to market today, such as 802.1x and TKIP. The main pieces of the
802.11i draft that are not included in WPA are secure IBSS (Ad-Hoc mode), secure fast handoff
(for specialized 802.11 VoIP phones), as well as enhanced encryption protocols such as
AES-CCMP. These features are either not yet ready for market or will require hardware upgrades
to implement.
What are the Key Features of WPA Security?
The following security features are included in the WPA standard:
• WPA Authentication
• WPA Encryption Key Management
– Temporal Key Integrity Protocol (TKIP)
–Michael
message integrity code (MIC)
– AES Support
• Support for a Mixture of WPA and WEP Wireless Clients
These features are discussed below.
WPA addresses most of the known WEP vulnerabilities and is primarily intended for wireless
infrastructure networks as found in the enterprise. This infrastructure includes stations, access
points, and authentication servers (typically RADIUS servers). The RADIUS server holds (or has
access to) user credentials (e.g., user names and passwords) and authenticates wireless users
before they gain access to the network.
- User’s Manual for the 1
- NETGEAR Double 108 1
- Mbps Wireless PC Card 1
- 32-bit CardBus WG511U 1
- Technical Support 2
- Statement of Conditions 2
- FCC Information to User 3
- Export Restrictions 4
- Regulations 4
- Contents 5
- 4 Contents 8
- Chapter 1 9
- About This Manual 9
- How to Navigate this Manual 10
- How to Print this Manual 11
- 1-4 About This Manual 12
- August 2004 12
- Introduction 13
- Chapter 2 13
- What’s in the Box? 14
- Introduction 2-3 15
- 2-4 Introduction 16
- Introduction 2-5 17
- Use printers in 18
- Chapter 3 19
- Basic Setup 19
- Two Basic Operating Modes 20
- Basic Setup 3-3 21
- WG511U Resource CD 22
- InstallShield Wizard 22
- Basic Setup 3-5 23
- 3-6 Basic Setup 24
- NETGEAR_11g or type an 24
- SSID for 24
- Basic Setup 3-7 25
- Table 3-1: LED Descriptions 25
- 3-8 Basic Setup 26
- Basic Setup 3-9 27
- 3-10 Basic Setup 28
- Basic Setup 3-11 29
- Table 3-2: LED Descriptions 29
- 3-12 Basic Setup 30
- Table 3-3: LED Descriptions 30
- Troubleshooting 32
- Basic Setup 3-15 33
- 3-16 Basic Setup 34
- Chapter 4 35
- Netgear Smart Wireless Wizard 35
- Figure 4-2: Settings page 37
- Chapter 5 43
- Using WEP Security 44
- Appendix A 51
- Technical Specifications 51
- A-2 Technical Specifications 52
- Appendix B 53
- Wireless Networking Basics 53
- Wireless Channels 54
- U-NII Band Low Middle High 56
- Wireless Security Overview 58
- WEP Overview 59
- WEP Keys 61
- How to Use WEP Parameters 62
- WPA Wireless Security 65
- How Does WPA Compare to WEP? 66
- Wired Network with Optional 68
- WPA 802.1x Port Based 68
- Network Access Control 68
- Wireless Network 68
- Is WPA Perfect? 72
- Product Support for WPA 72
- • Wireless network adapters 73
- • Wireless client programs 73
- Appendix C 75
- Windows 98 and Me 77
- Verifying TCP/IP Properties 79
- 3. Type ipconfig /all 85
- 4. Type exit 85
- Glossary 87
- See TLS 89
- See also Wireless 92
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