Now, consider a circuit-switched network that has a 150 Mbps link capacity where each user requires a bandwidth of 10 Mbps when transmitting, but are only active 10 percent of the time. What is the maximum number of users that can be supported?

Total Capacity available = 150Mpbs

One user requirement = 10Mbps

Maximum number of users = Total Capacity/ User requirement  Maximum number of users = 150/10

                             = 15 users

Explanation:

Circuit switching allocates a dedicated capacity per user unlike Packet switching which allows more efficient usage of network resources (e.g., bandwidth) for  bursty data applications, by taking advantage of statistical multiplexing of resources.

the answer will be d