IEEE 802.3 is a set of standards developed by the Institute of Electrical and Electronics Engineers for wired local area networks (LANs). It primarily defines the physical and data link layers of the network, focusing on Ethernet technology, which is widely used for connecting computers and devices in homes and businesses. The IEEE 802.3 standards cover various aspects, including cable types, data rates, and network topologies. They ensure compatibility and interoperability between different devices and manufacturers, allowing for efficient data transmission over wired connections. This standard has evolved over time to support faster speeds and improved performance.