Which layer of the OSI Model is responsible for interacting with the operating system to transfer data?

The Application layer is the topmost layer of the OSI Model and serves as the interface between the end-user applications and the underlying network protocols. Its primary role is to enable end-user interaction with the network, providing services such as file transfers, email, and web browsing.

When applications need to transfer data over a network, they rely on the protocols defined at this layer to format their messages appropriately and access network services. This layer communicates directly with the operating system, using system calls to send and receive data. Essentially, it translates the data requests from application programs into a format that can be transmitted across the network, making it essential for facilitating user interactions with networked resources.

In summary, the Application layer's function of directly engaging with the operating system to transfer data underscores its pivotal role in network communication and user applications, distinguishing it from the other layers of the OSI Model that handle more specific network functions.