Final answer:
In FastEthernet, a switch transmits data using pins 1 and 2, while it receives data using pins 3 and 6. This allows for full-duplex communication, which is capable of a data rate of 100 Mbps using standard RJ-45 cables.
Step-by-step explanation:
In a FastEthernet connection, a switch transmits data on pins 1 and 2, and receives data on pins 3 and 6. FastEthernet is a type of Ethernet network that can transmit data at 100 megabits per second. For 10/100 Mbps systems (10Base-T and 100Base-TX), the traditional RJ-45 cables have eight pins, where different pins are used for transmitting and receiving data to adhere to the Ethernet standards.
This setup allows for full-duplex communication, where transmission and reception of data can occur simultaneously, resulting in better network performance and mitigating collisions that were common in older, half-duplex systems like hubs. Understanding which pins are used for transmission and reception is essential for those involved in network installation, troubleshooting, and testing.