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Appendix C IP Addresses and Subnetting
User’s Guide
226
As these two IP addresses cannot be used for individual hosts, calculate the
maximum number of possible hosts in a network as follows:
Notation
Since the mask is always a continuous number of ones beginning from the left,
followed by a continuous number of zeros for the remainder of the 32 bit mask,
you can simply specify the number of ones instead of writing the value of each
octet. This is usually specified by writing a “/” followed by the number of bits in
the mask after the address.
For example, 192.1.1.0 /25 is equivalent to saying 192.1.1.0 with subnet mask
255.255.255.128.
The following table shows some possible subnet masks using both notations.
Table 72 Maximum Host Numbers
SUBNET MASK HOST ID SIZE
MAXIMUM NUMBER OF
HOSTS
8 bits 255.0.0.0 24 bits 2
24
– 2 16777214
16 bits 255.255.0.0 16 bits 2
16
– 2 65534
24 bits 255.255.255.0 8 bits 2
8
– 2 254
29 bits 255.255.255.2
48
3 bits 2
3
– 2 6
Table 73 Alternative Subnet Mask Notation
SUBNET
MASK
ALTERNATIVE
NOTATION
LAST OCTET
(BINARY)
LAST OCTET
(DECIMAL)
255.255.255.0 /24 0000 0000 0
255.255.255.12
8
/25 1000 0000 128
255.255.255.19
2
/26 1100 0000 192
255.255.255.22
4
/27 1110 0000 224
255.255.255.24
0
/28 1111 0000 240
255.255.255.24
8
/29 1111 1000 248
255.255.255.25
2
/30 1111 1100 252
- Wireless N-lite 3G Router 1
- About This User's Guide 3
- Documentation Feedback 4
- Need More Help? 4
- Customer Support 5
- Document Conventions 6
- Icons Used in Figures 7
- Safety Warnings 8
- Contents Overview 10
- User’s Guide 10
- Table of Contents 11
- Chapter 5 12
- Chapter 6 12
- Introduction 19
- CHAPTER 1 21
- 1.5 LEDs 22
- Chapter 1 Introduction 23
- LED COLOR STATUS DESCRIPTION 23
- Chapter 1 Introduction 24
- CHAPTER 2 25
- Chapter 2 The WPS Button 26
- CHAPTER 3 27
- 3.3 Resetting the NBG4115 29
- 3.5.1 Navigation Panel 32
- Table 4 Screens Summary 33
- Table 5 Summary: DHCP Table 35
- CHAPTER 4 39
- 4.3.1 System Name 40
- 4.3.2 Domain Name 41
- 4.4 STEP 2: Wireless LAN 42
- 4.5.1 Ethernet Connection 44
- 4.5.2 PPPoE Connection 45
- 4.5.3 PPTP Connection 46
- Chapter 4 Connection Wizard 47
- 4.5.4 Mobile 3G 48
- 4.5.5 Your IP Address 49
- 4.5.10 WAN MAC Address 52
- Chapter 4 Connection Wizard 54
- CHAPTER 5 55
- Figure 26 Status: AP Mode 56
- Chapter 5 AP Mode 57
- 5.3.1 Navigation Panel 58
- 5.4 LAN Settings 59
- Chapter 5 AP Mode 62
- CHAPTER 6 63
- [email protected] 64
- Wireless Client 69
- ZyXEL Device 69
- 6.4.2 PIN Configuration 70
- SSID SSID_Example3 71
- Channel 6 71
- Security WPA-PSK 71
- Figure 35 Confirm Save 73
- 6.6 Bandwidth Management 74
- TCP 7070 76
- RTSP TCP or UDP 554 76
- VDO LIVE TCP 7000 76
- FTP TCP 20 ~ 21 76
- Chapter 6 Tutorials 78
- CHAPTER 7 81
- 7.1.2 What You Should Know 82
- MAC Address Filter 83
- User Authentication 83
- Encryption 84
- 7.2 General 85
- Chapter 7 Wireless LAN 86
- 7.2.1 No Security 87
- 7.2.2 WEP Encryption 87
- 7.2.3 WPA-PSK/WPA2-PSK 89
- 7.3 MAC Filter 90
- 7.4 Advanced 92
- Chapter 7 Wireless LAN 93
- 7.5 QoS 94
- 7.6 WPS 97
- 7.7 WPS Station 98
- 7.8 Scheduling 99
- Table 35 Scheduling 100
- CHAPTER 8 101
- 8.2.1 What You Need To Know 102
- WAN MAC Address 103
- Multicast 103
- NetBIOS over TCP/IP 103
- Auto-Bridge 104
- 8.3 Internet Connection 105
- 8.3.2 PPPoE 106
- 8.3.3 PPTP 108
- Chapter 8 WAN 109
- LABEL DESCRIPTION 109
- Chapter 8 WAN 110
- 8.3.4 Mobile 3G 111
- 8.4 Advanced 113
- Table 40 WAN > Advanced 114
- CHAPTER 9 115
- LAN and WAN IP Addresses 116
- IP Pool Setup 116
- LAN TCP/IP 116
- Chapter 9 LAN 117
- Chapter 9 LAN 118
- CHAPTER 10 119
- 10.2 General 120
- 10.3 Advanced 121
- 10.4 Client List 122
- Chapter 10 DHCP Server 123
- Chapter 10 DHCP Server 124
- CHAPTER 11 125
- 11.1.2 What You Need To Know 126
- What NAT Does 127
- How NAT Works 127
- 11.2 General 128
- 11.3 Application 129
- Chapter 11 NAT 130
- 11.4 Advanced 131
- 11.5 Technical Reference 132
- CHAPTER 12 135
- 12.2 General 136
- Table 49 Dynamic DNS 137
- Chapter 12 DDNS 138
- PART III 139
- CHAPTER 13 141
- 13.1.2 What You Need To Know 142
- 13.2 General 144
- 13.3 Services 144
- Chapter 13 Firewall 145
- Chapter 13 Firewall 146
- CHAPTER 14 147
- 14.2 Filter 148
- 14.3 Technical Reference 149
- Full Path URL Checking 150
- File Name URL Checking 150
- Management 151
- CHAPTER 15 153
- 15.2 IP Static Route 154
- Chapter 15 Static Route 156
- CHAPTER 16 157
- 16.2 General 158
- 16.3 Advanced 159
- 16.3.2 Priority Levels 162
- SERVICE DESCRIPTION 164
- CHAPTER 17 165
- 17.2 WWW 166
- Chapter 17 Remote Management 167
- Chapter 17 Remote Management 168
- CHAPTER 18 169
- 18.2 General 170
- 18.3 Technical Reference 171
- Figure 93 System Tray Icon 174
- Web Configurator Easy Access 175
- Chapter 18 UPnP 177
- Chapter 18 UPnP 178
- Maintenance and 179
- Troubleshooting 179
- CHAPTER 19 181
- Chapter 19 System 182
- 19.3 Time Setting 183
- Chapter 19 System 185
- CHAPTER 20 187
- Chapter 20 Logs 188
- CHAPTER 21 189
- 21.2 Firmware 190
- Figure 102 Upload Warning 191
- 21.3 Configuration 192
- 21.3.2 Restore Configuration 193
- 21.4 Restart 194
- CHAPTER 22 195
- 22.2 General 196
- Internet 197
- Chapter 22 Sys OP Mode 198
- CHAPTER 23 199
- Chapter 23 Language 200
- CHAPTER 24 201
- I forgot the password 203
- 24.4 Internet Access 204
- Defaults 206
- Chapter 24 Troubleshooting 208
- Appendices and 209
- APPENDIX A 211
- FEATURE DESCRIPTION 212
- Table 69 Firmware Features 213
- APPENDIX B 215
- JavaScripts 218
- Java Permissions 220
- JAVA (Sun) 221
- Figure 123 Java (Sun) 222
- APPENDIX C 223
- Subnet Masks 224
- Network Size 225
- Notation 226
- Subnetting 227
- Example: Four Subnets 228
- Table 74 Subnet 1 229
- Table 75 Subnet 2 229
- Table 76 Subnet 3 229
- Table 77 Subnet 4 229
- Example: Eight Subnets 230
- Subnet Planning 230
- Configuring IP Addresses 231
- Private IP Addresses 232
- APPENDIX D 233
- Windows 95/98/Me 234
- Configuring 235
- Verifying Settings 236
- Windows 2000/NT/XP 237
- Macintosh OS 8/9 243
- Macintosh OS X 245
- Using Configuration Files 248
- 24.6.1 Verifying Settings 250
- APPENDIX E 251
- Figure 153 RTS/CTS 254
- Fragmentation Threshold 255
- Preamble Type 255
- IEEE 802.1x 256
- Types of Authentication 257
- PEAP (Protected EAP) 258
- Dynamic WEP Key Exchange 258
- Encryption 259
- Security Parameters Summary 262
- APPENDIX F 263
- Appendix F Services 264
- Appendix F Services 265
- APPENDIX G 267
- Industry Canada Statement 268
- IMPORTANT NOTE: 269
- Notices 269
- Viewing Certifications 269
- ZyXEL Limited Warranty 270
- End-User License Agreement 270
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