Multiple Access protocols o Single shared broadcast channel o two or more simultaneous transmissions by nodes interference Collision if node receives two or more signals at the same time Multiple access protocol o Distributed algorithm that determines how nodes share channel, i.e., determine when node can transmit o Communication about channel sharing must use channel itself e no out-of-band channel for coordination 5: DatMultiple Access protocols  Single shared broadcast channel  Two or more simultaneous transmissions by nodes: interference  Collision if node receives two or more signals at the same time Multiple access protocol  Distributed algorithm that determines how nodes share channel, i.e., determine when node can transmit  Communication about channel sharing must use channel itself!  No out-of-band channel for coordination 5: DataLink Layer 5-12