NETGEAR DG814 DSL manual The five address classes are Class A

Reference Manual for the Model DG814 DSL Modem Internet Gateway

Class A

Network		Node
Class B
Network		Node
Class C
	Network		Node

7261

Figure B-1. Three Main Address Classes

The five address classes are:

•Class A

Class A addresses can have up to 16,777,214 hosts on a single network. They use an eight-bit network number and a 24-bit node number. Class A addresses are in this range:

1.x.x.x to 126.x.x.x.

•Class B

Class B addresses can have up to 65,354 hosts on a network. A Class B address uses a 16-bit network number and a 16-bit node number. Class B addresses are in this range:

128.1.x.x to 191.254.x.x.

•Class C

Class C addresses can have 254 hosts on a network. Class C addresses use 24 bits for the network address and eight bits for the node. They are in this range:

192.0.1.x to 223.255.254.x.

•Class D

Class D addresses are used for multicasts (messages sent to many hosts). Class D addresses are in this range:

224.0.0.0 to 239.255.255.255.

•Class E

Class E addresses are for experimental use.

Networks and Routing Basics B-3