1.3 Methods of Information Transmission
There are many different network protocols and several protocols can be available even on a single layer. Especially with lower-layer protocols, we distinguish between the types of transmission that they facilitate, whether they provide connection-oriented or connection-less services, if the protocol uses virtual circuits, and so on. We also distinguish between synchronous, packet, and asynchronous transmission.
1.3.1 Synchronous Transmission
Synchronous transmission is needed when it is necessary to provide a stable (guaranteed) bandwidth, for example, in audio and video. If the source does not use the provided bandwidth it remains unused. Synchronous transmission uses frames that are of fixed length and ...
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