H3C S3100 8C SI - Chapter 1 Ip Addressing Configuration; Ip Address Classes; Ip Addressing Overview

Operation Manual –IP Address-IP Performance
H3C S3100 Series Ethernet Switches Chapter 1 IP Addressing Configuration
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Chapter 1 IP Addressing Configuration
1.1 IP Addressing Overview
1.1.1 IP Address Classes
IP addressing uses a 32-bit address to identify each host on a network. An example is
01010000100000001000000010000000 in binary. To make IP addresses in 32-bit form
easier to read, they are written in dotted decimal notation, each being four octets in
length, for example, 10.1.1.1 for the address just mentioned.
Each IP address breaks down into two parts:
z Net ID: The first several bits of the IP address defining a network, also known as
class bits.
z Host ID: Identifies a host on a network.
For administration sake, IP addresses are divided into five classes, as shown in the
following figure (in which the blue parts represent the address class).
Figure 1-1 IP address classes
Table 1-1 describes the address ranges of these five classes. Currently, the first three
classes of IP addresses are used in quantity.