Which of the following is NOT a layer of the OSI model?

The OSI (Open Systems Interconnection) model is a conceptual framework used to understand and implement a network protocol suite in seven distinct layers, each with its specific functions and roles in data communication.

The correct choice identifies "Internet" as the layer that does not belong to the OSI model. The seven layers of the OSI model are:

1. Physical

2. Data Link

3. Network

4. Transport

5. Session

6. Presentation

7. Application

The term "Internet" is often associated with the TCP/IP model, which adopts a different structure, including layers like the Internet layer. However, it does not correlate directly to any of the seven OSI layers.

By understanding the established layers of the OSI model, it's clear that "Internet" is not among them, reinforcing knowledge of network architecture and protocols. This distinction is crucial for anyone involved in networking, as it underlines the varying frameworks and their uses in different contexts.