April 2024
Intermediate to advanced
268 pages
10h
German
Content preview from Softwareentwicklung, 2nd Edition
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14 Kommunikation und Netzwerke
14.1 Grundlagen
14.1.1 Modelle
Das OSI-Schichtenmodell (Open Systems Interconnection Model) definiert die verschiedenen Abstraktionsebenen von Netzwerken. Das Modell ist eher theoretischer Natur. Oft können Technologien nicht richtig eingeordnet werden, weil sie sich über mehrere Ebenen erstrecken. Doch es geht primär darum zu verstehen, dass man sich auf einer tieferen Ebene befindet, wenn man über Netzwerk-Sockets spricht, als wenn es um HTTP-Requests geht. Das Modell kennt folgende sieben Schichten, in der Reihenfolge von hoher zu tiefer Abstraktion:
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Application Layer
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Presentation Layer
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Session Layer
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Transport Layer
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Network Layer
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Data Link Layer
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Physical Layer
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