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P-660R-T Series User’s Guide
Appendix C IP Subnetting
280
Subnetting With Class A and Class B Networks.
For class “A” and class “B” addresses the subnet mask also determines which bits are part of
the network number and which are part of the host ID.
A class “B” address has two host ID octets available for subnetting and a class “A” address has
three host ID octets (see
) available for subnetting.
The following table is a summary for class “B” subnet planning.
Table 99
Class B Subnet Planning
NO. “BORROWED” HOST
BITS
SUBNET MASK
NO. SUBNETS
NO. HOSTS PER
SUBNET
1
255.255.128.0 (/17)
2
32766
2
255.255.192.0 (/18)
4
16382
3
255.255.224.0 (/19)
8
8190
4
255.255.240.0 (/20)
16
4094
5
255.255.248.0 (/21)
32
2046
6
255.255.252.0 (/22)
64
1022
7
255.255.254.0 (/23)
128
510
8
255.255.255.0 (/24)
256
254
9
255.255.255.128 (/25)
512
126
10
255.255.255.192 (/26)
1024
62
11
255.255.255.224 (/27)
2048
30
12
255.255.255.240 (/28)
4096
14
13
255.255.255.248 (/29)
8192
6
14
255.255.255.252 (/30)
16384
2
15
255.255.255.254 (/31)
32768
1
Summary of Contents for ADSL2+ 4-port Gateway P-660H-D Series
Page 1: ...P 660R T Series ADSL2 Ethernet Gateway User s Guide Version 3 40 6 2005 ...
Page 23: ...P 660R T Series User s Guide 23 ...
Page 27: ...P 660R T Series User s Guide 27 ...
Page 31: ...P 660R T Series User s Guide 31 Introduction to DSL ...
Page 39: ...P 660R T Series User s Guide 39 Chapter 1 Getting To Know Your Prestige ...
Page 57: ...P 660R T Series User s Guide 57 Chapter 4 Password Setup ...
Page 65: ...P 660R T Series User s Guide 65 Chapter 5 LAN Setup ...
Page 75: ...P 660R T Series User s Guide 75 Chapter 6 WAN Setup ...
Page 87: ...P 660R T Series User s Guide 87 Chapter 7 Network Address Translation NAT Screens ...
Page 95: ...P 660R T Series User s Guide 95 Chapter 10 Remote Management Configuration ...
Page 107: ...P 660R T Series User s Guide 107 Chapter 11 Universal Plug and Play UPnP ...
Page 127: ...P 660R T Series User s Guide 127 Chapter 14 Menu 1 General Setup ...
Page 131: ...P 660R T Series User s Guide 131 Chapter 15 Menu 2 WAN Backup Setup ...
Page 135: ...P 660R T Series User s Guide 135 Chapter 16 Menu 3 LAN Setup ...
Page 157: ...P 660R T Series User s Guide 157 Chapter 19 Static Route Setup ...
Page 161: ...P 660R T Series User s Guide 161 Chapter 20 Bridging Setup ...
Page 177: ...P 660R T Series User s Guide 177 Chapter 21 Network Address Translation NAT ...
Page 205: ...P 660R T Series User s Guide 205 Chapter 24 System Information and Diagnosis ...
Page 217: ...P 660R T Series User s Guide 217 Chapter 25 Firmware and Configuration File Maintenance ...
Page 223: ...P 660R T Series User s Guide 223 Chapter 26 System Maintenance ...
Page 227: ...P 660R T Series User s Guide 227 Chapter 27 Remote Management ...
Page 237: ...P 660R T Series User s Guide 237 Chapter 28 IP Policy Routing ...
Page 241: ...P 660R T Series User s Guide 241 Chapter 29 Call Scheduling ...
Page 253: ...P 660R T Series User s Guide 253 Chapter 30 Troubleshooting Figure 173 Java Sun ...
Page 257: ...P 660R T Series User s Guide 257 Appendix A ...
Page 281: ...P 660R T Series User s Guide 281 Appendix C IP Subnetting ...
Page 284: ...P 660R T Series User s Guide Appendix D Splitters and Microfilters 284 ...
Page 285: ...P 660R T Series User s Guide 285 Appendix D Splitters and Microfilters ...
Page 287: ...P 660R T Series User s Guide 287 Appendix E Command Interpreter ...
Page 295: ...P 660R T Series User s Guide 295 Virtual Circuit Topology ...