CSMA:(Carrier Sense Multiple access) o 1-Persistent CSMa e If channel sensed idle: transmit entire pkt e If channel sensed busy, wait until channel becomes idle and then transmit right away. o If collision occurs waitrandom time and then restart process Non-persistent CSMA: (for nonslotted channels e If channel sensed idle: transmit entire pkt o If channel sensed busy, waitrandom time before trying again o If collision occurs waitrandom time and then restart process o P-Persistent CSMA: (for slotted channels o If channel sensed idle then, with probability p, transmit in current slot. With probability q=1-p, wait until next slot and try again(with probability p o If channel sensed busy wait until next slot and try again e If collision occurs, waitrandom time and then restart process 5: DatCSMA: (Carrier Sense Multiple Access)  1-Persistent CSMA  If channel sensed idle: transmit entire pkt  If channel sensed busy, wait until channel becomes idle and then transmit right away.  If collision occurs wait random time and then restart process  Non-persistent CSMA: (for nonslotted channels)  If channel sensed idle: transmit entire pkt  If channel sensed busy, wait random time before trying again.  If collision occurs wait random time and then restart process  P-Persistent CSMA: (for slotted channels)  If channel sensed idle then, with probability p, transmit in current slot. With probability q=1-p, wait until next slot and try again (with probability p)  If channel sensed busy wait until next slot and try again  If collision occurs, wait random time and then restart process 5: DataLink Layer 5-20