Which Ethernet standard provides Fast Ethernet at 100 Mbps over Category 5 cable with a 100-meter maximum distance?

Which Ethernet standard provides Fast Ethernet at 100 Mbps over Category 5 cable with a 100-meter maximum distance?

• A. 10BASE-T
• B. 100BASE-TX
• C. 1000BASE-T
• D. 1000BASE-SX

Answer: (B)

Fast Ethernet at 100 Mbps over Category 5 copper with a 100-meter limit is provided by 100BASE-TX. This standard uses two copper pairs (one for transmit, one for receive) and is specified to run up to 100 meters on Cat5 cable. The 100 Mbps speed and two-pair design distinguish it from other Ethernet forms: 10BASE-T runs at 10 Mbps over copper with the same general 100-meter limit; 1000BASE-T delivers Gigabit speeds by using all four pairs on copper but at 1 Gbps; 1000BASE-SX is Gigabit Ethernet over multimode fiber, not copper. So the description matches 100BASE-TX.

Fast Ethernet at 100 Mbps over Category 5 copper with a 100-meter limit is provided by 100BASE-TX. This standard uses two copper pairs (one for transmit, one for receive) and is specified to run up to 100 meters on Cat5 cable. The 100 Mbps speed and two-pair design distinguish it from other Ethernet forms: 10BASE-T runs at 10 Mbps over copper with the same general 100-meter limit; 1000BASE-T delivers Gigabit speeds by using all four pairs on copper but at 1 Gbps; 1000BASE-SX is Gigabit Ethernet over multimode fiber, not copper. So the description matches 100BASE-TX.