Which of the following layers comes directly after the Physical Layer in the OSI Model?

The Data Link Layer comes directly after the Physical Layer in the OSI Model, which is structured into seven layers. Each layer has its specific responsibilities and functions that facilitate communication between devices over a network.

The Physical Layer is responsible for the actual transmission of data over a physical medium, dealing with aspects such as the electrical signals, light signals, and the physical connections (cables, switches, etc.). Once that physical transmission is established, the next layer, which is the Data Link Layer, takes the raw bitstream from the Physical Layer and formats it into frames. This layer is essential for providing node-to-node data transfer and error detection and correction.

The Data Link Layer also governs how devices on the same physical network segment communicate with one another, implementing protocols for identifying device addresses (such as MAC addresses) and controlling access to the shared medium, thus ensuring that data transmitted is delivered accurately and in order.

By understanding the roles of these layers in the OSI Model, it clarifies why the Data Link Layer follows the Physical Layer directly and how they collaborate in network communication.