This paper presents the development of Ethernet networks and standards. It describes the experimental version of Ethernet network developed and implemented by scientists Robert M. Metcalfe and David R. Boggs as well as solutions used to detect packet collision. The second part of the paper puts an emphasis on CSMA systems and IEEE standards and gives a detailed overview of IEEE 802.3 standards. The final part aims to describe IEEE frame and its main difference from DIX frame, including an overview of Ethernet speeds that are defined and used with IEEE standards.