Problem
Suppose users share a 2Mbps link. Also suppose each user requires 500kbps when transmitting, but each user transmits only 10% of the time. (See the discussion of packet switching versus circuit switching in Section 1.3)
• When circuit switching is used, how many users can be supported?
• For the remainder of this problem, suppose packet switching is used. Find the probability that a giving user is transmitting.
• Suppose there are 5 users, find the probability that at any given time, all 5 users are transmitting simultaneously. What is the probability that there are 4 or less users transmitting simultaneously?