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Email is one of the most important uses of TCP/IP.


You Don't
When you write an email, you don't use TCP/IP.

When you write an email, you use an email program like Lotus Notes, Microsoft Outlook or Netscape Communicator.


Your Email Program Does
Your email program uses different TCP/IP protocols:
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TCP/IP is a large collection of different communication protocols.


A Family of Protocols
TCP/IP is a large collection of different communication protocols based upon the two original protocols TCP and IP.



TCP - Transmission Control Protocol
TCP is used for transmission of data from an application to the network.
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TCP/IP uses 32 bits, or four numbers between 0 and 255, to address a computer.



IP Addresses
Each computer must have an IP address before it can connect to the Internet.

Each IP packet must have an address before it can be sent to another computer.
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TCP/IP is the communication protocol for the Internet.



Computer Communication Protocol
A computer communication protocol is a description of the rules computers must follow to communicate with each other.



What is TCP/IP?
TCP/IP is the communication protocol for communication between computers on the Internet.
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TCP/IP is the communication protocol for the Internet.

In this tutorial you will learn what TCP/IP is, and how it works.



TCP/IP is the Internet Communication Protocol
A communication protocol is a description of the rules computers must follow to communicate with each other.
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