Which version of Ethernet can transmit data at speeds up to 1Gbps?

The version of Ethernet capable of transmitting data at speeds up to 1Gbps is 1000Base-T. This standard, also known as Gigabit Ethernet, supports this high data rate over twisted-pair cabling, specifically using the same Category 5 (or better) cabling employed for 100Base-T. It uses all four pairs of wires in the cable to achieve its speed, allowing for efficient and reliable data transmission.

In contrast, 100Base-T supports a maximum speed of 100Mbps, and both 10Base-T and 10GBase-T offer lower and higher speeds, respectively. Thus, 100Base-T cannot reach Gigabit speeds, and while 10GBase-T can transmit data at much higher rates (up to 10Gbps), it does not meet the specific requirement of transmitting data at 1Gbps.