Data Link
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What is Data Link?
The Data Link layer is the second layer of the OSI model, responsible for node-to-node data transfer and error detection within a single network segment. It organizes raw bits from the Physical layer into frames and uses MAC addresses to identify devices on the local network. This layer is divided into two sublayers: the Logical Link Control (LLC) and the Media Access Control (MAC).
Free resources to learn Data Link
More in stage 5: TCP/IP Model
Data Link: common questions
Can I learn Data Link in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Data Link in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Data Link tutorial for beginners?
It is lesson 63 of 195 in the free Network Engineer roadmap, in stage 5, TCP/IP Model. If you are new to Network Engineer, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.