Dynamically updating copyright dates

A packet switched network only allocates bandwidth when a block of data is ready to be sent, and only enough for that one block to travel over one network link at a time.

The history of packet switching so far indicates that further applications are inevitable.Thus, as digital electronics became inexpensive enough, it became dramatically more cost-effective to completely redesign communications networks, introducing the concept of packet switching where the transmission banwidth is dynamically allocated, permitting many users to share the same transmission line previously required for one user.Packet witching has been so successful, not only in improving the economics of data communications but in enhanang reliability and functional flexibility as well, that in 1978 virtually all mew data networks being built throughout the world are based on packet switching.Most radio usage also involves preallocation of the spectrum, either permanently or for single call.On the other hand, message, telegraph, and mail systems have historically operated by dynamically allocating bandwidths or space after a message is received, one link at a time, never attempting to schedule bandwidth over the whole source-to--destination path.

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  1. Zusätzlich verwende ich natürlich auch Übungsblätter zur Grammatik, aber ich mache sie im Plenum oder in Gruppen 1 bis 2mal an zwei Tagen durch, bevor ich sie schriftlich machen lasse (wenn Sie wollen, als Hausaufgabe zum Einprägen).