Java Glossary : Datagram

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Datagram: If your business can be conducted with one small packet in and one small packet out, you can save the overhead of setting up a TCP/IP stream, and use the simpler UDP protocol. The packets it sends are called datagrams. The catch is, there is no guarantee of delivery. You use the Java classes DatagramPacket and DatagramSocket. SNTP (Simple Network Time Protocol) uses datagrams. You send a request datagram to an atomic time server and it sends you back a datagram with the current precise time.
IP ¤ UDP

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