Which of the following types of connections can use full duplex?
1.Hub to hub
2.Switch to switch
3.Host to host
4.Switch to hub
5.Switch to host
Answer: D
Hubs cannot run full-duplex Ethernet. Full duplex must be used on a point-to-point connection between two devices capable of running full duplex. Switches and hosts can run full duplex between each other, but a hub can never run full duplex.