27.7 Datagrams: Connectionless Client/Server Interaction
We’ve been discussing connection-oriented, streams-based transmission. Now we consider connectionless transmission with datagrams.
Connection-oriented transmission is like the telephone system in which you dial and are given a connection to the telephone of the person with whom you wish to communicate. The connection is maintained for your phone call, even when you’re not talking.
Connectionless transmission with datagrams is more like the way mail is carried via the postal service. If a large message will not fit in one envelope, you break it into separate pieces that you place in sequentially numbered envelopes. All of the letters are then mailed at once. The letters could arrive ...
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