(单选题)A hub is a ( )device that acts on individual bits rather than on frames.

(单选题)The ability to determine whether a frame should be forwarded to some interface or should just be dropped is ( ).

(单选题)For odd parity schemes, which of the following is correct? ( )

(单选题)The computer network that concentrated in a geographical area, such as in a building or on a university campus, is ( ).

(单选题)With ( ) transmission, a node cannot both transmit and receive at the same time.