The Medium Access Control (MAC) sublayer for broadcast network determines which user could broadcast through the public channel to all the other users who are sharing that channel to avoid the potential chaos.

1. (a) ALOHA is one of the simple multiple access protocols.Explain how pureALOHA and slotted ALOHA work.

2. (b) What is the performance of ALOHA protocol?

3. (c) To improve the throughput of the network and reduce collisions, what else does each sta tion do in CSMA (Carrier Sense Multiple Access) protocol?

4. (d) Please compare the CSMA and CSMA/CD and explain what tradeoff CSMA/CD makes to achieve to achieve higher performance.

5. (e) CSMA/CD does a good job when the network is at low load though, it cannot avoid all the collisions. Name a collisionfree protocol, and explain how it works.