Question $9$

Consider the two cases given below:

$-$ A circuit$-$switching in which $\backslash ($ N $\backslash )$ users, each requiring a bandwidth of $25$ Mbps $,$ must share a link of capacity $100$ Mbps$.$

$-$ A packet$-$switching in which m users sharing a $100$ Mbps link, where each user again requires $25$ Mbps when transmitting, but only needs to transmit $20$ percent of the time.

When circuit switching is used, what is the maximum number of users that can be supported?

A$.25$

B$.10$

C$.7$

D$.4$