a. What does CS  mean? (Do not just spell out the abbreviation.)

19a.) In CS MA/CA, CS  means __________.

a. Cancel sending

b. Counter-source

c. Carriage suspension

d. Carrier sense

b. How is carrier sensing used in multiple access?

19b.) In CSMA/CD + ACK , when a wireless NIC  wishes to transmit, it listens for traffic. If there is traffic, it waits. When the traffic stops, it may transmit immediately.

a. This statement is __________.

b. Always true

c. Sometimes true

d. Always false

c. Why is CA  desirable?

d. Does a frame’s receiver transmit an ACK  immediately or after a random delay?

19d.) When a receiver transmits an ACK, __________.

a. It must use CSMA/CA 

b. It must use CSMA 

c. In must use CA 

d. It must transmit immediately

e. Is CSMA/CA+ACK  reliable or unreliable?

19e.) CSMA/CA+ACK  is __________.

a. Unreliable

b. Reliable

c. Semireliable

f. Why was 802.11 made reliable?

19f.) Which is one of the only two reliable protocols we have seen this term?

a. IP

b. CSMA/CA+ACK 

c. UDP

d. 802.3