Which block of addresses would be the minimum to accommodate all of these devices if each type of device was on its own network?

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A company has several networks with the following IP address requirements:

IP phones – 50
PCs – 70
IP cameras – 10
wireless access points – 10
network printers – 10
network scanners – 2

Which block of addresses would be the minimum to accommodate all of these devices if each type of device was on its own network?

172.16.0.0/25
172.16.0.0/24
172.16.0.0/23
172.16.0.0/22

Explanation: The network for the PCs would require a subnet mask of /25 in order to accommodate 70 devices. That network could use IP addresses 0 through 127. Phones require a subnet mask of /26 for 50 devices (addresses 128-191). Three /28 networks are needed in order to accommodate cameras, APs, and printers. The network scanner network can use a /30. A block of addresses with a mask of /24 will accommodate this site as the minimum amount needed.

Which block of addresses would be the minimum to accommodate all of these devices if each type of device was on its own network?

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