(单选题)A router works in ( ) layer?

(单选题)A switch works in ( ) layer?

(单选题)Networking layer provides services between two ( ).

(单选题)The units of data exchanged by a link-layer protocol are called ( ).

(单选题)Consider CRC error checking approach, the four bit generator G is 1011, and suppose that the data D is 10101010, then the value of R is ( ).

(单选题)The ARP protocol can translate ( ) into ( ). ( )

(单选题)In ( ) transmission(s), the nodes at both ends of a link may transmit packets at the same time.

(单选题)MAC address is ( ) bits long.

(单选题)Wireless LAN using protocol ( ).

(单选题)A MAC address is a ( )address.

(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.