Multiple Access Protocols
Aloha at University of Hawaii: Transmit whenever you likeWorst case utilization = 1/(2e) =18%
CSMA: Carrier Sense Multiple Access Listen before you transmit
CSMA/CD: CSMA with Collision DetectionListen while transmitting. Stop if you hear someone else.
Ethernet uses CSMA/CD.Standardized by IEEE 802.3 committee.