Prestige 660RU-Tx Series User’s Guide
263
Appendix C
Divide the network 192.168.1.0 into two separate subnets by converting one of the host ID bits
of the IP address to a network number bit. The “borrowed” host ID bit can be either “0” or “1”
thus giving two subnets; 192.168.1.0 with mask 255.255.255.128 and 192.168.1.128 with
mask 255.255.255.128.
The remaining 7 bits determine the number of hosts each subnet can have. Host IDs of all
zeros represent the subnet itself and host IDs of all ones are the broadcast address for that
subnet, so the actual number of hosts available on each subnet in the example above is 2
7
– 2
or 126 hosts for each subnet.
192.168.1.0 with mask 255.255.255.128 is the subnet itself, and 192.168.1.127 with mask
255.255.255.128 is the directed broadcast address for the first subnet. Therefore, the lowest IP
address that can be assigned to an actual host for the first subnet is 192.168.1.1 and the highest
is 192.168.1.126. Similarly the host ID range for the second subnet is 192.168.1.129 to
192.168.1.254.
Note:
In the following charts, shaded/bolded last octet bit values indicate host
ID bits “borrowed” to form network ID bits. The number of “borrowed” host ID
bits determines the number of subnets you can have. The remaining number
of host ID bits (after “borrowing”) determines the number of hosts you can
have on each subnet.
Table 88
Subnet 1
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address
192.168.1.
0
IP Address (Binary)
11000000.10101000.00000001.
0
0000000
Subnet Mask
255.255.255.
128
Subnet Mask (Binary)
11111111.11111111.11111111.
1
0000000
Subnet Address: 192.168.1.0
Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.127
Highest Host ID: 192.168.1.126
Table 89
Subnet 2
NETWORK NUMBER
LAST OCTET BIT VALUE
IP Address
192.168.1.
128
IP Address (Binary)
11000000.10101000.00000001.
1
0000000
Subnet Mask
255.255.255.
128
Subnet Mask (Binary)
11111111.11111111.11111111.
1
0000000
Subnet Address:
192.168.1.128
Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.255
Highest Host ID: 192.168.1.254
Summary of Contents for ADSL2+ Ethernet/USB Gateway 660RU-Tx Series
Page 1: ...Prestige 660RU Tx Series ADSL2 Ethernet USB Gateway User s Guide Version 3 40 January 2005 ...
Page 2: ......
Page 22: ...Prestige 660RU Tx Series User s Guide 21 ...
Page 26: ...Prestige 660RU Tx Series User s Guide 25 ...
Page 30: ...Prestige 660RU Tx Series User s Guide 29 Introduction to DSL ...
Page 38: ...Prestige 660RU Tx Series User s Guide 37 Chapter 1 Getting To Know Your Prestige ...
Page 56: ...Prestige 660RU Tx Series User s Guide 55 Chapter 4 Password Setup ...
Page 64: ...Prestige 660RU Tx Series User s Guide 63 Chapter 5 LAN Setup ...
Page 74: ...Prestige 660RU Tx Series User s Guide 73 Chapter 6 WAN Setup ...
Page 86: ...Prestige 660RU Tx Series User s Guide 85 Chapter 7 Network Address Translation NAT Screens ...
Page 94: ...Prestige 660RU Tx Series User s Guide 93 Chapter 10 Remote Management Configuration ...
Page 108: ...Prestige 660RU Tx Series User s Guide 107 Chapter 11 Universal Plug and Play UPnP ...
Page 124: ...Prestige 660RU Tx Series User s Guide 123 Chapter 13 Introducing the SMT ...
Page 128: ...Prestige 660RU Tx Series User s Guide 127 Chapter 14 Menu 1 General Setup ...
Page 132: ...Prestige 660RU Tx Series User s Guide 131 Chapter 15 Menu 2 WAN Backup Setup ...
Page 136: ...Prestige 660RU Tx Series User s Guide 135 Chapter 16 Menu 3 LAN Setup ...
Page 158: ...Prestige 660RU Tx Series User s Guide 157 Chapter 19 Static Route Setup ...
Page 162: ...Prestige 660RU Tx Series User s Guide 161 Chapter 20 Bridging Setup ...
Page 178: ...Prestige 660RU Tx Series User s Guide 177 Chapter 21 Network Address Translation NAT ...
Page 206: ...Prestige 660RU Tx Series User s Guide 205 Chapter 24 System Information and Diagnosis ...
Page 224: ...Prestige 660RU Tx Series User s Guide 223 Chapter 26 System Maintenance ...
Page 228: ...Prestige 660RU Tx Series User s Guide 227 Chapter 27 Remote Management ...
Page 238: ...Prestige 660RU Tx Series User s Guide 237 Chapter 28 IP Policy Routing ...
Page 242: ...Prestige 660RU Tx Series User s Guide 241 Chapter 29 Call Scheduling ...
Page 260: ...Prestige 660RU Tx Series User s Guide 259 Appendix B ...
Page 268: ...Prestige 660RU Tx Series User s Guide 267 Appendix C ...
Page 272: ...Prestige 660RU Tx Series User s Guide 271 Appendix E ...
Page 274: ...Prestige 660RU Tx Series User s Guide 273 Appendix F ...
Page 280: ...Prestige 660RU Tx Series User s Guide 279 Appendix G ...