Netgear Double 108 Mbps Wireless PC Card WG511U User Manual Page 68
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User’s Manual for the NETGEAR Double 108 Mbps Wireless PC Card 32-bit CardBus WG511U
B-16 Wireless Networking Basics
August 2004
Figure B-5: WPA Overview
The strength WPA comes from an integrated sequence of operations that encompass 802.1X/EAP
authentication and sophisticated key management and encryption techniques. Its major operations
include:
• Network security capability determination. This occurs at the 802.11 level and is
communicated through WPA information elements in Beacon, Probe Response, and (Re)
Association Requests. Information in these elements includes the authentication method
(802.1X or Pre-shared key) and the preferred cipher suite (WEP, TKIP, or AES).
The primary information conveyed in the Beacon frames is the authentication method and the
cipher suite. Possible authentication methods include 802.1X and Pre-shared key. Pre-shared
key is an authentication method that uses a statically configured pass phrase on both the
stations and the access point. This eliminates the need for an authentication server, which in
many home and small office environments will not be available nor desirable. Possible data
encryption options include: WEP, TKIP, and AES (Advanced Encryption Standard). We’ll talk
more TKIP and AES when addressing data privacy below.
• Authentication. EAP over 802.1X is used for authentication. Mutual authentication is gained
by choosing an EAP type supporting this feature and is required by WPA. 802.1X port access
control prevents full access to the network until authentication completes. 802.1X
EAPOL-Key packets are used by WPA to distribute per-session keys to those stations
successfully authenticated.
WPA
enabled
wireless
client with
“supplicant”
Optional
Certificate
Authority
(eg Win
Server,
VeriSign,
etc)
TCP/IP
Ports Closed
Until
RADIUS Server
Wired Network with Optional
WPA 802.1x Port Based
Network Access Control
WPA enabled
Access Point
using
pre-shared key
or
802.1x/EAP
TCP/IP
Ports Opened
After
Authenticated
Wireless Network
Login
Authentication
- 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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