3com WX3000 Benutzerhandbuch

 

1-1 

z 

The term switch used throughout this document refers to a switching device in a generic sense or 

the switching engine of the WX3000 series. 

z 

The sample output information in this manual was created on the WX3024. The output information 

on your device may vary. 

 

IP addressing uses a 32-bit address to identify each host on a network. An example is 

01010000100000001000000010000000 in binary. To make IP addresses in 32-bit form easier to read, 

they are written in dotted decimal notation, each being four octets in length, for example, 10.1.1.1 for the 

address just mentioned.  

Each IP address breaks down into two parts:  

z 

Net ID: The first several bits of the IP address defining a network, also known as class bits. 

z 

Host ID: Identifies a host on a network. 

For administration sake, IP addresses are divided into five classes, as shown in the following figure (in 

which the blue parts represent the address class). 

Figure 1-1 IP address classes 

0

Net-id

Host-id

1

Net-id

Host-id

0

1

Net-id

Host-id

0

1

1

Multicast address

0

1

1

1

Reserved

1

1

1

Class A

0

7

15

23

31

Class B

Class C

Class D

Class E

 

 

 describes the address ranges of these five classes. Currently, the first three classes of IP 

addresses are used in quantity.