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Appendix D Wireless LANs
P-870HW-51a v2 User’s Guide
249
An ESSID (ESS IDentification) uniquely identifies each ESS. All access points and
their associated wireless clients within the same ESS must have the same ESSID
in order to communicate.
Figure 158 Infrastructure WLAN
Channel
A channel is the radio frequency(ies) used by wireless devices to transmit and
receive data. Channels available depend on your geographical area. You may have
a choice of channels (for your region) so you should use a channel different from
an adjacent AP (access point) to reduce interference. Interference occurs when
radio signals from different access points overlap causing interference and
degrading performance.
Adjacent channels partially overlap however. To avoid interference due to overlap,
your AP should be on a channel at least five channels away from a channel that an
adjacent AP is using. For example, if your region has 11 channels and an adjacent
AP is using channel 1, then you need to select a channel between 6 or 11.
RTS/CTS
A hidden node occurs when two stations are within range of the same access
point, but are not within range of each other. The following figure illustrates a
hidden node. Both stations (STA) are within range of the access point (AP) or
- P-870HW-51a v2 1
- About This User's Guide 3
- Customer Support 4
- Document Conventions 5
- Icons Used in Figures 6
- Safety Warnings 7
- New Template User’s Guide 10
- Table of Contents 11
- Chapter 8 13
- Chapter 9 13
- Introduction 17
- CHAPTER 1 19
- 1.4.1 Internet Access 20
- 1.5 LEDs (Lights) 21
- 1.6 The RESET Button 22
- 1.7 The WPS WLAN Button 23
- CHAPTER 2 25
- Figure 3 AP: Wireless LAN 26
- Figure 5 AP: Status 27
- Internet 28
- Figure 17 Profile: Activate 34
- CHAPTER 3 35
- Figure 18 Password Screen 36
- Figure 19 Main Screen 36
- 3.2.1 Navigation Panel 37
- 3.2.2 Main Window 38
- 3.2.3 Status Bar 38
- CHAPTER 4 39
- Table 3 Status Screen 40
- 4.1.1 WAN Service Statistics 42
- 4.1.2 Route Info 43
- Chapter 4 Status Screens 44
- 4.1.3 WLAN Station List 45
- 4.1.4 LAN Statistics 46
- 4.1.5 Client List 47
- WAN Setup (51) 49
- LAN Setup (69) 49
- Wireless LAN (79) 49
- CHAPTER 5 51
- 5.2 What You Need to Know 52
- 5.3 Before You Begin 52
- Chapter 5 WAN Setup 54
- Chapter 5 WAN Setup 55
- 5.5.1 More Connections Edit 59
- 5.6 Technical Reference 63
- Encapsulation 64
- ENET ENCAP 64
- PPP over Ethernet 64
- IP Address Assignment 64
- Full Cone NAT 65
- Symmetric NAT 65
- Introduction to VLANs 66
- Multicast 67
- DNS Server Address Assignment 67
- CHAPTER 6 69
- 6.2 What You Need To Know 70
- 6.3 Before You Begin 71
- 6.4 The LAN IP Screen 71
- 6.5 The Client List Screen 72
- 6.6 The IP Alias Screen 73
- 6.7 Technical Reference 75
- IP Address and Subnet Mask 76
- Private IP Addresses 76
- Chapter 6 LAN Setup 78
- CHAPTER 7 79
- 7.2 What You Need to Know 80
- Radio Channels 81
- Wireless Security 81
- 7.3 Before You Begin 82
- 7.4 The General Screen 82
- Chapter 7 Wireless LAN 83
- 7.4.1 No Security 84
- 7.4.2 WEP Encryption 85
- 7.4.3 WPA(2)-PSK 86
- 7.4.4 WPA(2) Authentication 88
- 7.5 The WPS Screen 89
- 7.6 The WPS Station Screen 91
- 7.9 Technical Reference 94
- 7.9.3.1 SSID 96
- 7.9.3.2 MAC Address Filter 96
- 7.9.3.3 User Authentication 97
- 7.9.3.4 Encryption 97
- 7.9.4 WiFi Protected Setup 98
- 7.9.4.2 PIN Configuration 99
- 7.9.4.3 How WPS Works 101
- Figure 50 How WPS works 102
- REGISTRARENROLLEE 103
- SECURITY INFO 103
- REGISTRAR 103
- ENROLLEE 103
- EXISTING CONNECTION 103
- Chapter 7 Wireless LAN 106
- P-870HW-51a v2 User’s Guide 106
- CHAPTER 8 107
- LABEL DESCRIPTION 109
- 8.4 The DMZ Host Screen 111
- 8.5 Technical Reference 112
- PART III 115
- CHAPTER 9 117
- Default Filtering Policies 118
- Chapter 9 IP Filter 119
- Chapter 9 IP Filter 122
- Advanced 123
- CHAPTER 10 125
- 10.2 The Static Route Screen 126
- 10.2.1 Static Route Edit 127
- Chapter 10 Static Route 128
- CHAPTER 11 129
- 11.2 What You Need to Know 130
- 11.4 The Queue Setup Screen 131
- 11.4.1 Adding a QoS Queue 132
- Figure 66 QoS Class Setup 133
- Table 40 QoS Class Setup 133
- 11.5.1 QoS Class Edit 135
- 11.6 Technical Reference 137
- IEEE 802.1Q Tag 138
- DiffServ 138
- DSCP and Per-Hop Behavior 139
- CHAPTER 12 141
- 12.3 The Dynamic DNS Screen 142
- CHAPTER 13 143
- Figure 69 TR-069 144
- Table 44 TR-069 144
- Figure 70 Service Control 145
- Table 44 TR-069 (continued) 145
- 13.4 The IP Address Screen 146
- 13.4.1 Adding an IP Address 147
- Chapter 13 Remote Management 148
- CHAPTER 14 149
- 14.3 The UPnP Screen 150
- Installing UPnP in Windows Me 151
- Installing UPnP in Windows XP 153
- Web Configurator Easy Access 159
- Network 160
- Maintenance 163
- Troubleshooting 163
- CHAPTER 15 165
- 15.2 The General Screen 166
- Chapter 15 System Settings 168
- CHAPTER 16 169
- 16.3 The Log Settings Screen 170
- Chapter 16 Logs 172
- CHAPTER 17 173
- Figure 95 Error Message 175
- Backup Configuration 176
- Restore Configuration 177
- 17.4 The Restart Screen 178
- Chapter 17 Tools 179
- Chapter 17 Tools 180
- CHAPTER 18 181
- I forgot the password 182
- 18.3 Internet Access 183
- Chapter 18 Troubleshooting 185
- Chapter 18 Troubleshooting 186
- CHAPTER 19 187
- 19.3 Wireless Features 190
- Table 57 Wireless Features 191
- STANDARD DESCRIPTION 192
- Appendices and 193
- APPENDIX A 195
- Windows XP/NT/2000 196
- Properties 197
- Verifying Settings 198
- Windows Vista 200
- Mac OS X: 10.3 and 10.4 205
- Mac OS X: 10.5 209
- Linux: Ubuntu 8 (GNOME) 212
- Linux: openSUSE 10.3 (KDE) 218
- APPENDIX B 225
- JavaScripts 228
- Java Permissions 230
- JAVA (Sun) 231
- Mozilla Firefox 232
- APPENDIX C 235
- Subnet Masks 236
- Network Size 237
- Notation 238
- Subnetting 238
- Example: Four Subnets 240
- Table 63 Subnet 1 241
- Table 64 Subnet 2 241
- Table 65 Subnet 3 241
- Table 66 Subnet 4 241
- Example: Eight Subnets 242
- Subnet Planning 242
- Configuring IP Addresses 243
- IP Address Conflicts 244
- APPENDIX D 247
- Figure 159 RTS/CTS 250
- Fragmentation Threshold 251
- Preamble Type 251
- IEEE 802.11g Wireless LAN 251
- Wireless Security Overview 252
- IEEE 802.1x 253
- Types of EAP Authentication 254
- PEAP (Protected EAP) 255
- Dynamic WEP Key Exchange 256
- WPA and WPA2 256
- Encryption 257
- User Authentication 258
- Security Parameters Summary 260
- Antenna Overview 261
- Antenna Characteristics 261
- Types of Antennas for WLAN 261
- Positioning Antennas 262
- APPENDIX E 263
- Appendix E Common Services 264
- Appendix E Common Services 265
- APPENDIX F 267
- ZyXEL Limited Warranty 269
- Registration 270
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