(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.