1. Lecture 8 review Discuss programming assignment 1.
Medium access protocols
Which issue is under consideration?
Three general approaches:
Contention-based protocols: compete and hope the message will get through
Contention-free protocols: Organize so that everybody knows when to send
In between (limited contention protocols)

2. Lecture 8 review Contention-based protocols Contention-free protocols
ALOHA, Slotted ALOHA, CSMA, CSMA/CD
Contention-free protocols
Bit-map method, binary coundown, token passing
Limited contention protocol
Adaptive tree walk