Which layer protocol is SLIP classified under?

SLIP, or Serial Line Internet Protocol, is classified under Layer 2 of the OSI model, which is the Data Link layer. This layer is responsible for node-to-node data transfer and can also provide a way for devices on the same local area network to communicate with each other. SLIP was designed to transmit IP packets over serial connections and encapsulates Internet Protocol (IP) datagrams for transmission over serial lines.

Being a Layer 2 protocol, SLIP involves the framing of data for transport and controls how data is sent over a serial link, ensuring that the data is packaged correctly for the devices communicating across that link. While it provides basic error detection and facilitates communication between network points, it does not offer features like flow control or error correction, which higher-layer protocols might provide.

Thus, placing SLIP in the context of the OSI model reinforces its role in managing how bits are transmitted over a variety of links, confirming its classification as a Layer 2 protocol.