Full-Duplex Ethernet and FastEthernet

Full-Duplex Ethernet and FastEthernet
Full-duplex Ethernet can both transmit and receive simultaneously and uses point-to-point connections.
It is typically referred to as “collision free” because it doesn’t share bandwidth with
any other devices. Frames sent by two nodes cannot collide because physically separate transmit
and receive circuits are between the nodes.
Both 10Mbps and 100Mbps Ethernet use four of the eight pins available in standard Category
5 UTP cable. Pin 1 on one side and pin 3 on the other are linked, as are pins 2 and 6.
When the connection is configured for half duplex, the data can flow in only one direction at
a time, while with full duplex, data can come and go without collisions because the receive
and send channels are separate.
Full duplex is available when connected to a switch but not to a hub. Full duplex is also available
on 10Mbps, 100Mbps, and Gigabit Ethernet. Because it eliminates collisions, a full-duplex
connection will disable the collision detection function on the port.