Is Ethernet stand for IEEE 802.3 i'm correct?

yes, Ethernet is a family of wired networking technologies that are defined by the IEEE 802.3 standard. The Ethernet protocol specifies the physical and data link layers of the OSI model and defines the characteristics of the physical medium, the signaling method used to transmit data, and the format of the data packets that are transmitted over the network.

Ethernet is one of the most widely used networking technologies and is used in both local area networks (LANs) and wide area networks (WANs). It is used to transmit data between devices such as computers, servers, and routers, and provides a high-speed, reliable, and cost-effective way to connect devices in a network.

In summary, Ethernet is a family of networking technologies that are defined by the IEEE 802.3 standard, and is widely used to connect devices in a network using a wired connection.