Addresses
The Internet is a vast network of many different computers that are able to talk to each other in spite of the fact that they may be separated by large distances, may be very different computers built by different manufacturers, and may be running many different kinds of operating systems. This is similar to people in (say) Israel, Brazil, Japan, the United States, and Norway, each normally speaking a different language, being able to converse almost instantaneously with each other on very broad ranges of topics!
 TCP/IP Protocols
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Naming System
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Packets of Information
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Finding Addresses
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Addresses
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Going Further
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The computers of the Internet exchange packets of information using addresses that have much in common with ordinary mail addresses. These addresses are called Internet Protocol (IP) addresses.