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Appendix A Wireless LANs

N220 User’s Guide

BSS

A Basic Service Set (BSS) exists when all communications between wireless

clients or between a wireless client and a wired network client go through one

access point (AP).

Intra-BSS traffic is traffic between wireless clients in the BSS. When Intra-BSS is

enabled, wireless client A and B can access the wired network and communicate

with each other. When Intra-BSS is disabled, wireless client A and B can still

access the wired network but cannot communicate with each other.

Figure 23 Basic Service Set

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 83 84

Wireless N-lite USB Adapter 1
About This User's Guide 3
Customer Support 4
Document Conventions 5
Icons Used in Figures 6
Safety Warnings 7
Contents Overview 10
N220 User’s Guide 10
Table of Contents 11
CHAPTER 1 13
1.2 Features 14
1.3 Hardware Installation 15
1.4 Software Installation 15
1.5 Device Applications 19
Chapter 1 Getting Started 20
CHAPTER 2 21
2.2 Wireless LAN Overview 22
2.3 Wireless LAN Security 23
2.3.1.2 IEEE 802.1x 24
2.4 WiFi Protected Setup 25
2.4.2 PIN Configuration 26
2.4.3 How WPS Works 28
Figure 6 How WPS works 29
REGISTRARENROLLEE 30
SECURITY INFO 30
REGISTRAR 30
ENROLLEE 30
EXISTING CONNECTION 30
2.4.4 Limitations of WPS 31
CHAPTER 3 33
3.1.3 Before You Begin 34
3.3 The Profile Screen 35
LABEL DESCRIPTION 36
3.6 The Link Status Screen 40
3.7 The Site Survey Screen 41
3.8 The Statistics Screen 43
3.9 The Advanced Screen 45
3.10 The WPS Screen 46
3.11 The About Screen 50
Table 14 Mac OS X: About 51
CHAPTER 4 53
4.4 Link Quality 54
Computers 55
Chapter 4 Troubleshooting 56
CHAPTER 5 57
WIRELESS STANDARDS 58
SOFTWARE SPECIFICATIONS 59
WIRELESS FEATURES 59
APPENDIX A 61
Figure 23 Basic Service Set 62
Figure 25 RTS/CTS 64
Fragmentation Threshold 65
Preamble Type 65
IEEE 802.11g Wireless LAN 66
Wireless Security Overview 66
IEEE 802.1x 67
Types of EAP Authentication 68
PEAP (Protected EAP) 69
Dynamic WEP Key Exchange 70
WPA and WPA2 70
Encryption 71
User Authentication 72
Security Parameters Summary 74
Antenna Overview 75
Antenna Characteristics 75
Types of Antennas for WLAN 75
Positioning Antennas 76
APPENDIX B 77
Industry Canada Statement 79
Notices 79
Viewing Certifications 80

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