Fundamentals of Ethernet (IEEE 802.3 and DIX)

Last Updated:-July 05, 2024

Ethernet is the popular LAN technology to create a home network. IEEE 802.3 defines the technical aspects of an Ethernet.

Ethernet is a LAN media type that uses CSMA/CD to send information and functions at the Data Link Layer of the OSI Reference Model.

Which Topology Ethernet Uses?

Ethernet media types having different physical topologies but support a single logical topology: bus topology. I will explain the different kinds of topologies supported by Ethernet later.

Ethernet supports Bus logical topology only.

We can design an Ethernet LAN with different shapes (using different physical topologies), but the communication happens in Bus topology only.

Physical Topologies Supported By Ethernet

You must understand one point. Ethernet supports multiple physical topologies. However, the communication happens in bus topology only.

  1. Bus topology

  2. Star Topology

  3. Point to Point

Different Versions of Ethernet

It has two versions right now. One is the DIX version, and the second is the IEEE version. This tutorial explains various topologies and versions of Ethernet.

We have two versions of Ethernet now.

Let us check the two different Ethernet standards.

  1. DIX Version

    DIX Ethernet or Ethernet 2 is popular. This version does not split the Data Link layer into two. Ethernet 2 has a frame value of more than 1500. This standard is designed by the combined work of three companies.

    Those companies are DEC, Intel, and Xerox. This standard gets the name DIX by taking the first letter from the names of these three companies.

  2. IEEE Version

    This version of Ethernet comes under IEEE 802.2 and 802.3. Here, the data link layer has two divisions. They are LLC and MAC. To read more about it, visit the links below.

    We can easily distinguish between an IEEE ethernet and a DIX Ethernet. The Frame value of IEEE802.3 is less than 1500. It is the difference between IEEE and DIX versions.

To read more about the devices and protocols work in standard, visit the link below.

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