Which IEEE standard corresponds to 100 Mbps Ethernet?

The IEEE standard that corresponds to 100 Mbps Ethernet is 802.3u. This standard defines Fast Ethernet, which operates at 100 Mbps and can use different types of media, including twisted pair cabling (using 100Base-TX) and fiber optics (using 100Base-FX).

Understanding the specifics of this standard is important for concepts related to Ethernet technology. Fast Ethernet introduced higher speeds to local area networks (LANs) while maintaining compatibility with earlier Ethernet versions.

The other standards listed pertain to different Ethernet technologies: 802.3i refers to the original 10 Mbps Ethernet, 802.3ab is for Gigabit Ethernet over copper twisted pairs (1000 Mbps), and 802.3an pertains to 10 Gigabit Ethernet. Each of these standards serves a specific function and speed, making 802.3u distinct for its role in enabling the 100 Mbps speed.