Identify the layer described.

layer is responsible for the communication of unstructured raw data streams over a physical medium.

layer concerns data transmission between the nodes within a network and manages the connections between physically connected devices such as switches. layer implements logical addressing for data packets to distinguish between the source and destination networks.

layer ensures complete and reliable delivery of data packets.

Layer is responsible for a range of functions including opening, closing, and re$-$establishing session activities, authentication and authorization of communication between specific apps and servers, identifying full$-$duplex or half$-$duplex operations, and synchronizing data streams.

presentation layer, also called the syntax layer, maps the semantics and syntax of the data such that the received information is consumable for every distinct network entity.

layer interacts directly with end$-$users to provide support for email, network data sharing, file transfers, and directory services, among other distributed information services.