Netgear ADSL Firewall Router DG834 User Manual download pdf (Page 155)

Reference Manual for the ADSL Firewall Router DG834

Network and Routing Basics B-3

202-10005-05, June 2005

Figure 8-1: 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.

lass A

etwork Node

lass B

lass C

Network Node

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Netgear ADSL Firewall Router DG834 User Manual Page 155