Which of the following is not a property of an ideal multiple access protocol? O a. ' In a broadcast channel of bandwidth R, when there is only one node sending, it can send at rate R. O b. In a broadcast channel of bandwidth R, when there are N nodes sending, each can send at rate R/N. C Centralized O d. Simple When using the l-persistent CSMA technique, if the medium is busy, the station continues to listen until the channel is sensed idle and then transmits immediately. a. True O b. False