What is the most accurate definition of wire speed with switching?

A. Switching between two ports can happen at wire speed.
B. The switch can process requests at the incoming speed of the connection.
C. The switch can process requests at the incoming and outgoing speed of the connection.
D. The switch can auto-negotiate between several different wire speeds.

C. Wire speed is the switch’s ability to process packets both incoming and outgoing on the same port at wire speed. However, this is not the switch’s ability to switch at that speed; the speed of the switch is limited by its backplane bandwidth.