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MAC Sublayer Defined in IEEE 802.3

During the development of IEEE Ethernet, IEEE divided Data Link layer into two. They are MAC sublayer and LLC sublayer. MAC sublayer functions are performed in hardware and are the bottom part of the data link layer. MAC sublayer is defined in IEEE 802.3. MAC sublayer defines how data is transmitted in an Ethernet environment and defines framing, MAC address, etc. Let us check the functions of MAC sublayer in the details below.

Major Functions of MAC Sublayer in IEEE Ethernet
  1. Defines how information is transmitted in an Ethernet environment

  2. MAC Sublayer defines framing

  3. This Sublayer defines the working of Ethernet and MAC addressing

  4. CSMA/CD works in MAC Sublayer

How to Differentiate Ethernet II and MAC Sublayer Frames

We know Ethernet has two versions and it is important to know how to differentiate both versions of Ethernet. The major difference between Ethernet II (developed by DIX) and IEEE 802.2/3 is the frame value. If the frame value is greater than 1500, the frame is of Ethernet II. IEEE version of Ethernet use frames with a value less than 1500. DIX version of Ethernet (Ethernet 2) does not have sub-layers for data link layer. To read more about LLC Sublayer, visit the link below.
LLC Sublayer (IEEE 802.2 )

Without studying the OSI Reference Model, you cannot start computer networking. To read about the OSI Reference Model and its seven-layered structure, visit the link below.
OSI Reference Model

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Alex George has Engineering graduation in Computer Science and an MBA in Finance. He had been working as a senior Network Engineer for ten years. His specialization is in Cisco products. Traveling is one of his hobbies and visited various places as part of his onsite work. He visited different places as part of his onsite work like New York, Dubai, London, etc. Right now Alex is a director of one of the leading career development firms in India, which trains students for UPSC, SSC, and PSC examinations. He guides a lot of students to get selection for various prestigious institutions like CBI, Income Tax Department, etc. Alex George is a stock market investor and a very active intraday trader. Engineering Background: He has a B.Tech in Computer Science and Engineering and passed different network and security courses like CCNA, CCNP (Security), CEH, and various Microsoft certifications. Finance Background: Alex has an MBA in Finance. He is an active intraday trader and a Share Market Investor. Webmaster Skills: Alex is a blogger since 2004. He has a working knowledge of HTML, CSS, PHP, and JavaScrip.