Installing and Administering LAN/9000 Software

134 Chapter6
Network Addressing
Internet Addresses
Figure 6-1 Internet Address Classes
The address classes can also be broken down by address ranges. Internet
addresses are typically represented by converting the bits to decimal
values an octet (8 bits) at a time, and separating each octet's decimal
value by a period ( . ). Therefore, internet addresses are typically of the
following form:
n.n.n.n
where n is a number from 0 to 255, inclusive. This form is referred to as
decimal dot notation or dot notation.
Table 6-4 lists the number of networks and nodes and the address ranges
for Class A, Class B, and Class C networks. Class D networks are
described later in this chapter in “IP Multicast Addresses.”
31 23 0
31 30 0
31 29 07
15
0
10
110
Class A
Network Address Host Address
Class B
Class C
Network Address Host Address
Network Address Host Address