Question

Suppose users share a 25 Mbps link. Also suppose each user transmits continuously at 5 Mbps when transmitting, and each user transmits only 20 percent of the time. When circuit switching is used, how many users can be supported

Answer 1

Two users have been supported as each user has half of the link bandwidth.

Explanation:

Two users require 1Mbps when transmitting, and fewer users transfer a maximum of 2 Mbps, and the available bandwidth of the shared link is 2 Mbps; there will be no queuing delay before connection. If three users, transmit, then bandwidth will be 3Mbps, and there will be queuing delay before the link. Link size = 2Mpbs, i.e. two users ,transmit, then a maximum of 2Mbps will require and does not exceed 2Mbps of bandwidth.