As the network engineer, you are given the following subnet IDs: 172.32.64.0, 172.32.168.0, and 172.32.192.0. Which of the following masks could be applied to this network?
A) 255.255.128.0
B) 255.255.192.0
C) 255.255.224.0
D) 225.255.248.0
D
Explanation: D) The correct answer is 225.255.248.0, because to solve this problem, you could find all the subnet IDs of network 172.32.0.0 when using each of the masks in the answers and compare each list to the subnet IDs listed in the question. If the list of all subnet IDs for a given mask includes all the numbers in the question, you could use that mask.
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