Netopia 430 s 参考指南

This appendix is a brief general introduction to IP addressing. A 
basic understanding of IP will help you in configuring the Netopia 
ISDN Router and using some of its power ful features, such as static 
routes and packet filtering.

In packets, a header is par t of the envelope information that 
surrounds the actual data being transmitted. In e-mail, a header is 
usually the address and routing information found at the top of 
messages.

All networks use protocols to establish common standards for 
communication. One widely used network protocol is the Internet 
Protocol, also known as IP. Like many other protocols, IP uses 
packets, or formatted chunks of data, to communicate.

Note: This guide uses the term “IP” in a ver y general and inclusive 
way, to identify all of the following: 

■

Networks that use the Internet Protocol, along with 
accompanying protocols such as TCP, UDP, and ICMP

■

Packets that include an IP header within their structure

■

Devices that send IP packets