Question: Suppose users share a 5Mbps link. Also suppose each user requires 150 kbps when transmitting, but each user transmits only 10 percent of the time.

  1. Suppose users share a 5Mbps link. Also suppose each user requires 150 kbps when transmitting, but each user transmits only 10 percent of the time.

  2. When circuit switching is used, how many users can be supported?

  3. Suppose packet switching is used. Find the probability that a given user is transmitting.

  4. Suppose there are 120 users. Find the probability that at any given time, exactly n users are transmitting simultaneously.

  5. Find the probability that there are 20 users transmitting simultaneously. Assume the probability of success and failure is equally likely.

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