2. how many bit strings of length 12 containa) exactly three 1s? b) at most three 1s? c) at least three 1s? d) an equal number of 0s and 1s?

1. you have a small business that is divided into 3 departments: accounting, sales, and administration. these departments have the following number of devices (computers, printers, etc.): accounting-31, sales-28, and administration-13. using a class c private network, subnet the network so that each department will have their own subnet. you must show/explain how you arrived at your conclusion and also show the following: all available device addresses for each department, the broadcast address for each department, and the network address for each department. also, determine how many "wasted" (not usable) addresses resulted from your subnetting (enumerate them).

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

Anetwork security application that prevents access between a private and trusted network and other untrusted networks