The Post-Office analogy

(This article is part of a series network-basics)

A nice way to illustrate the workings of an IP-network is to compare it’s addressing and routing to a traditional postal service.

In a computer network the material that needs to be transported is chopped into “packets”. Each packet has address information, the actual payload (the stuff that the user wants to transport) and then some. A packet could be compared to a single postcard or a letter send via post.

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Computer networks

(This article is part of a series network-basics)

So you want to make a computer to “talk” to another computer? Here the word “talking” would mean¬†using some communications protocol (we are interested in the Internet Protocol) to make these computers to send data packets to each other. These packets will amount to chat messages, electronic mail and transferring a file from one machine to another and many more things.

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