What function does the Data Link Layer perform in networking?

The Data Link Layer plays a crucial role in networking by handling two primary functions: framing and addressing. Framing involves packaging the raw bits from the Physical Layer into a structured format that includes headers and trailers, making it easier to manage and interpret the data. This structured format is essential for the efficient transmission of data across a single network segment.

Addressing at this layer involves identifying devices within the same local network. Each device is assigned a unique data link layer address, commonly known as a MAC (Media Access Control) address. This allows devices on the same network to communicate with one another while ensuring that data is sent to the correct recipient.

By managing how data is presented, as well as aiding in the identification and addressing of devices, the Data Link Layer provides a critical function that lies beneath the higher layers of the OSI model. This layer effectively prepares data for transmission and ensures proper delivery within a local network environment, distinguishing it from other networking functions that are handled at different layers.