Zyxel-communications NWD-270N Uživatelský manuál stáhnout pdf (Strana 47)

Chapter 4 Troubleshooting

NWD-270N User’s Guide

• If you are using WPA(2) or WPA(2)-PSK security, try changing your encryption type

from TKIP to AES or vice versa.

In Ad-Hoc Mode

• Verify that the peer computer(s) is turned on.

• Make sure the NWD-270N computer and the peer computer(s) are using the same SSID

and channel.

• Make sure that the computer and the peer computer(s) share the same security settings.

• Change the wireless clients to use another radio channel if interference is high.

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NWD-270N 1
About This User's Guide 3
Document Conventions 4
Icons Used in Figures 5
Safety Warnings 6
Table of Contents 7
CHAPTER 1 9
1.2 Features 10
1.3 Hardware Installation 11
1.4 Software Installation 11
Chapter 1 Getting Started 12
NWD-270N User’s Guide 12
Chapter 1 Getting Started 13
1.5 Device Applications 15
CHAPTER 2 17
2.2 Wireless LAN Overview 18
2.3 Wireless LAN Security 19
Chapter 2 Wireless LANs 20
2.4 WiFi Protected Setup 21
2.4.2 PIN Configuration 22
2.4.3 How WPS Works 23
Figure 6 How WPS works 24
REGISTRARENROLLEE 25
SECURITY INFO 25
REGISTRAR 25
ENROLLEE 25
EXISTING CONNECTION 25
2.4.4 Limitations of WPS 26
Chapter 2 Wireless LANs 27
CHAPTER 3 29
3.1.3 Before You Begin 30
3.3 The Profile Screen 31
3.6 The Link Status Screen 35
3.7 The Site Survey Screen 36
3.8 The Statistics Screen 37
3.9 The Advanced Screen 39
3.10 The WPS Screen 40
3.11 The About Screen 44
CHAPTER 4 45
4.4 Link Quality 46
Chapter 4 Troubleshooting 47
Chapter 4 Troubleshooting 48
CHAPTER 5 49
APPENDIX A 53
Verifying Settings 56
Mac OS X: 10.5 57
APPENDIX B 61
Subnet Masks 62
Notation 63
Subnetting 64
Example: Four Subnets 65
Example: Eight Subnets 66
Subnet Planning 67
Configuring IP Addresses 68
IP Address Conflicts 69
APPENDIX C 71
Appendix C Wireless LANs 72
Figure 29 Basic Service Set 72
Appendix C Wireless LANs 73
Figure 31 RTS/CTS 74
Fragmentation Threshold 75
Preamble Type 75
IEEE 802.11g Wireless LAN 75
Wireless Security Overview 76
IEEE 802.1x 76
Types of RADIUS Messages 77
Types of EAP Authentication 78
Dynamic WEP Key Exchange 79
WPA and WPA2 80
User Authentication 81
Security Parameters Summary 83
Antenna Overview 83
Antenna Characteristics 83
Types of Antennas for WLAN 84
Positioning Antennas 84
APPENDIX D 85
者均不得擅自變更頻率、加大功率或變更原設計之特性及功能。 86
有干擾現象時，應立即停用，並改善至無干擾時方得繼續使用。 86
ZyXEL Limited Warranty 87
Appendix D Legal Information 88
APPENDIX E 89
Appendix E Customer Support 90
Appendix E Customer Support 91

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