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Each TCP/IP node on a network host has a unique IP address. This address

provides the information needed to forward packets on the local network and

across multiple networks if necessary.

IP addresses are specified as x.x.x.x, where each x is a number from 1 to 254;

for example, 192.0.1.99. The unit must be assigned a unique IP address to use

TCP/IP network functionality.

This chapter includes the following topics:

Topic Page

Components of the IP Address 9-1

Network Address 9-2

Broadcast Address 9-2

IP Subnet Mask 9-2

Private IP Networks and the Internet 9-3

Network RFCs 9-3

Alternative Ways to Assign an IP Address 9-4

Components of the IP Address

Network Portion

The network portion of the IP address is determined by the network type: Class

A, B, or C.

Table 9-1. .Network Portion of IP Address

Network Class Network Portion of Address

Class A First byte (2nd, 3rd, and 4th bytes are the host)

Class B First 2 bytes (3rd and 4th bytes are the host)

Class C First 3 bytes (4th byte is the host)

In most network examples, the host portion of the address is set to zero.

Table 9-4. Available IP Addresses

Class Address Range Comments

A 1.0.0.1 to

126.255.255.254

126 networks of 16,777,214 hosts

B 128.1.0.1 to

191.254.255.254

16,328 networks of 65,534 hosts

192011to

2,097,150 networks of 254 hosts

XPort™ User Guide 9-1

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Lantronix XPort Manuale Utente Pagina 63