problem 1:

CSMA is the contention access protocol with the partial co-ordination among different users. Illustrate why and how CSMA must provide better throughput performance than ALOHA systems. Plot the throughput curves and provide your comments.

problem 2:

Discuss about the public switched telephone network (PSTN).

problem 3:

Illustrate how a PBX might be employed to provide telephone connections throughout the building.

problem 4:

Illustrate the link layer characteristics of the CDPD.

problem 5:

Illustrate the advanced radio information system (ARDIS).