Final answer:
The 10Base-T standard defines a 10Mbps ethernet network using Cat 3 or better UTP cabling, part of IEEE 802.3, and commonly used in the 1990s for LANs.
Step-by-step explanation:
The ethernet cabling standard that defines an ethernet network using Cat 3 or better UTP cabling, operating at 10Mbps, is known as 10Base-T. This standard is part of the IEEE 802.3 specification and became widely used in the 1990s for local area networking. It supports a maximum length of 100 meters per segment and employs a star topology where each device is connected to a hub or a switch.