Knowledge is a matter of definitions. Here you will find the most important technical terms for cybersecurity.

OSI Reference Model

The OSI reference model (Open Systems Interconnection model) defines seven layers, which divide the communication between two end points in a telecommunication network: Layer 7: Application Layer, Layer 6: Presentation Layer, Layer 5: Session Layer, Layer 4: Transport Layer, Layer 3: Network Layer, Layer 2: Data Link Layer and Layer 1: Physical Layer. When thinking about security of an environment, all layers should be considered. Thus, physical security measures on layer 1 against threats such as equipment overheating may be as important as threats on other layers.

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