John wants to divide his organization's network into 6 subnets. He should be able to allocate a maximum of 25 hosts on each subnet. The organization's network address is 202.142.16.5. Which of the following classful subnet masks should he use?
A)255.255.255.240
B)255.255.255.224
C)255.255.255.192
D)255.255.255.128

Question

Quizplus · Accepted Answer

The subnet mask that allows John to have 6 subnets with a maximum of 25 hosts per subnet is 255.255.255.224.
Key Takeaway: To divide a network such that a maximum of 6 subnets can be configured with at least 25 hosts per subnet, you should use the first 3 bits of the last octet as a part of the network ID. The other 5 bits should be used to identify the host in the subnet. Hence, the subnet mask is 255.255.255.224.

John Wants to Divide His Organization's Network into 6 Subnets