12. Data link layer tasks

12.2. Ethernet

Work on this standard dates back to the 1970s, when Xerox, one of the largest technology companies, decided to design an open network communication standard that would serve people for years to come. In the late 1970s, it developed a standard for local area networks and became the prototype for Ethernet. Today, Ethernet is the standard that can be found in most local computer networks around the world and, due to its many advantages, it has also become the standard for city networks and, in some cases, even wide area networks.

Ethernet is a complete set of networking solutions implemented at both the data link layer and the physical layer. The development of this technology is currently being overseen by the IEEE (Institute of Electrical and Electronics Engineers), which published its standard in 1985 and describes it under the numbers 802.2 and 802.3. The 802.2 standard includes functions related to the LLC sublayer, which is related to the MAC sublayer and the physical layer of the OSI model.

Many factors contribute to the success of Ethernet-based solutions, including:

·         easy to implement,

·         reliability,

·         ability to adapt new technologies,

·         Implementation costs are relatively low.