3Com 4500 PWR 26-Port Configuration Manual page 118

8
IP Addressing Configuration
When configuring IP addressing, go to these sections for information you are interested in:
IP Addressing Overview
Configuring IP Addresses
Displaying IP Addressing Configuration
IP Address Configuration Exa
IP Addressing O
IP Ad dress Classes
IP addressing uses a 32-bit address to identify each host on a network. An example is
010100001000000010000
they are written in dotted decimal notation, each
add ss just mentioned. re
Eac IP address breaks down into two parts h
Net ID: The first several bits of the IP address defining a network, also known as class bits.
Host ID: Identifies a host on a network.
For administration sake, IP add
which the blue parts represent the add
Figure 8-1 IP address classes
Table 8-1 describes the address ranges of
addresses are used in quantity.
mples
verview
00010000000 in binary. To make IP addresses in 32-bit form easier to read,
resses are divided into five classes, as shown in the following figure (in
ress class).
being four octets in length, for example, 10.1.1.1 for the
:
these five classes. Currently, the first three classes of IP
8-1