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IP Concepts, Terminology, and Features
117356-E Rev 00
1-3
Figure 1-1. Network and Host Portions of IP Addresses
You specify IP addresses in dotted-decimal notation. To express an IP address in
dotted-decimal notation, you convert each 8-bit octet of the IP address to a
decimal number and separate the numbers by decimal points.
For example, you specify the 32-bit IP address 10000000 00100000 00001010
10100111 in dotted-decimal notation as 128.32.10.167. The most significant 2
bits (10) in the first octet indicate that the network is Class B; therefore, the first
16 bits compose the NIC-assigned network portion field. The third octet
(00001010) and fourth octet (10100111) compose the host field.
8162431
8162431
8162431
0
Class A
Class B
Class C
Class A
Class B
Class C
1-127
128-191
192-223
25.0.0.1
140.250.0.1
192.2.3.1
25
140.250
192.2.3
1
1
1
0
1
0
1
Range
First Octet Network Host
10
0
Host portion
Network portion
IP0005A
1
Example
110
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