The Data Link Layer is the second layer in the OSI model, responsible for node-to-node data transfer and error detection and correction. It ensures reliable communication over a physical link by framing data packets, managing access to the physical medium, and addressing hardware through MAC addresses.

Data Link Layer

The OSI model is a conceptual framework used to understand and implement network protocols in seven distinct layers, each with specific functions and interactions. It serves as a guide for designing interoperable network systems and troubleshooting communication issues by isolating different network functions into manageable layers.

OSI model

node-to-node data transfer

Error detection and correction are essential techniques in digital communication and data storage to ensure data integrity and reliability. These methods identify and rectify errors that occur during data transmission or storage, preventing data corruption and loss.

error detection and correction

reliable communication

physical link

Data packets are structured units of data formatted for network transmission, containing headers, payload, and sometimes trailers, to ensure each piece arrives accurately and in sequence. They are fundamental to modern networking, enabling diverse and complex data exchange across the internet by using protocols to manage flow control, error detection, and congestion avoidance.

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