Netgear FVM318 – Cable and DSL ProSafe Wireless VPN Security Firewall 참조 매뉴얼

Network, Routing, Firewall, and Wireless Basics

B-3

195.34.12.7

The latter version is easier to remember and easier to enter into your computer.

In addition, the 32 bits of the address are subdivided into two parts. The first part of the address 
identifies the network, and the second part identifies the host node or station on the network. The 
dividing point may vary depending on the address range and the application.

There are five standard classes of IP addresses. These address classes have different ways of 
determining the network and host sections of the address, allowing for different numbers of hosts 
on a network. Each address type begins with a unique bit pattern, which is used by the TCP/IP 
software to identify the address class. After the address class has been determined, the software 
can correctly identify the host section of the address. The follow figure shows the three main 
address classes, including network and host sections of the address for each address type.

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: 

7261

Class A

Network

Node

Class B

Class C

Network

Node

Network

Node