Ip Address Overview; Ip Address Classification And Representation; Chapter 1 Ip Address Configuration - Huawei Quidway S3900 Series Operation Manual

Operation Manual – IP Address and Performance Confiugration
Quidway S3900 Series Ethernet Switches-Release 1510

Chapter 1 IP Address Configuration

1.1 IP Address Overview

1.1.1 IP Address Classification and Representation

An IP address is a 32-bit address allocated to a device connected to the Internet. It
consists of two fields: net-id and host-id. To facilitate IP address management, IP
addresses are divided into five classes, as shown in Figure 1-1.
0 0
Class A Class A
0 0
Class B Class B
1 0 1 0
Class C Class C
1 1 0 1 1 0
Class D Class D
1 1 1 0 1 1 1 0
Class E Class E
1 1 1 1 0 1 1 1 1 0
Figure 1-1 Five classes of IP addresses
Class A, Class B, and Class C IP addresses are unicast addresses. Class D IP
addresses are multicast addresses and Class E addresses are reserved for future
special use. The first three types are commonly used.
IP addresses are in the dotted decimal notation. Each IP address contains four
decimal integers, with each integer corresponding to one byte (for
example,10.110.50.101).
Some IP addresses are reserved for special use. The IP address ranges that can
be used by users are listed in Table 1-1.
1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
net-id net-id
net-id net-id
Multicast address Multicast address
Reserved address Reserved address
net-id: Network ID; host-id: Host ID net-id: Network ID; host-id: Host ID
Huawei Technologies Proprietary
1-1
Chapter 1 IP Address Configuration
host-id host-id
host-id host-id
net-id net-id host-id host-id