Appendix B IP Addresses and Subnetting
AMG1302-T10A User’s Guide
255
Figure 161
Subnetting Example: After Subnetting
In a 25-bit subnet the host ID has 7 bits, so each sub-network has a maximum of 2
7
– 2 or 126
possible hosts (a host ID of all zeroes is the subnet’s address itself, all ones is the subnet’s
broadcast address).
192.168.1.0 with mask 255.255.255.128 is subnet
A
itself, and 192.168.1.127 with mask
255.255.255.128 is its broadcast address. Therefore, the lowest IP address that can be assigned to
an actual host for subnet
A
is 192.168.1.1 and the highest is 192.168.1.126.
Similarly, the host ID range for subnet
B
is 192.168.1.129 to 192.168.1.254.
Example: Four Subnets
The previous example illustrated using a 25-bit subnet mask to divide a 24-bit address into two
subnets. Similarly, to divide a 24-bit address into four subnets, you need to “borrow” two host ID
bits to give four possible combinations (00, 01, 10 and 11). The subnet mask is 26 bits
(11111111.11111111.11111111.
11
000000) or 255.255.255.192.
Each subnet contains 6 host ID bits, giving 2
6
- 2 or 62 hosts for each subnet (a host ID of all
zeroes is the subnet itself, all ones is the subnet’s broadcast address).
Table 104
Subnet 1
IP/SUBNET MASK
NETWORK NUMBER
LAST OCTET BIT
VALUE
IP Address (Decimal)
192.168.1.
0
IP Address (Binary)
11000000.10101000.00000001.
00
000000
Subnet Mask (Binary)
11111111.11111111.11111111.
11
000000
Subnet Address:
192.168.1.0
Lowest Host ID: 192.168.1.1
Broadcast Address:
192.168.1.63
Highest Host ID: 192.168.1.62
Summary of Contents for AMG1302-T10A
Page 4: ...Contents Overview AMG1302 T10A User s Guide 4 ...
Page 12: ...Table of Contents AMG1302 T10A User s Guide 12 ...
Page 13: ...13 PART I User s Guide ...
Page 14: ...14 ...
Page 20: ...Chapter 1 Introduction AMG1302 T10A User s Guide 20 ...
Page 52: ...Chapter 4 Tutorials AMG1302 T10A User s Guide 52 ...
Page 53: ...53 PART II Technical Reference ...
Page 54: ...54 ...
Page 126: ...Chapter 8 Wireless LAN AMG1302 T10A User s Guide 126 ...
Page 140: ...Chapter 9 Network Address Translation NAT AMG1302 T10A User s Guide 140 ...
Page 158: ...Chapter 11 Filters AMG1302 T10A User s Guide 158 ...
Page 162: ...Chapter 12 Static Route AMG1302 T10A User s Guide 162 ...
Page 166: ...Chapter 13 Port Binding AMG1302 T10A User s Guide 166 ...
Page 176: ...Chapter 15 Quality of Service QoS AMG1302 T10A User s Guide 176 ...
Page 198: ...Chapter 18 Universal Plug and Play UPnP AMG1302 T10A User s Guide 198 ...
Page 202: ...Chapter 19 CWMP AMG1302 T10A User s Guide 202 ...
Page 206: ...Chapter 20 System Settings AMG1302 T10A User s Guide 206 ...
Page 216: ...Chapter 21 Logs AMG1302 T10A User s Guide 216 ...
Page 266: ...Appendix C Pop up Windows JavaScripts and Java Permissions AMG1302 T10A User s Guide 266 ...
Page 280: ...Appendix D Wireless LANs AMG1302 T10A User s Guide 280 ...
Page 290: ...Appendix E IPv6 AMG1302 T10A User s Guide 290 ...
Page 322: ...Appendix G Legal InformationSafety Warnings AMG1302 T10A User s Guide 322 ...