Which OSI layer is responsible for establishing connections between applications?

The Session layer is responsible for establishing connections between applications in the OSI model. Its primary function is to manage sessions, which are persistent connections between applications on different devices. This layer facilitates the opening, closing, and managing of these communication sessions, ensuring that data exchanges can happen smoothly and efficiently.

The Session layer also controls the dialogues between applications, allowing them to communicate in a structured way. This includes managing how data is exchanged, ensuring proper synchronization and maintaining the state of communication sessions. Overall, the Session layer plays a crucial role in enabling applications to communicate over a network by establishing and maintaining the necessary connections.