You have a network ID of 134.57.0.0 and you need to divide it into multiple subnets in which at least 600 host IDs for each subnet are available. You desire to have the largest amount of subnets available. Which subnet mask should you assign?
A. 255.255.224.0
B. 255.255.240.0
C. 255.255.248.0
D. 255.255.255.0
E. 255.255.255.255
Answer: Option D
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the formula for finding the subnets is 2n (n indicates the number of bits borrowed from host )
see the link it will help alot
https://www.youtube.com/watch?v=Ky8HiCItR04
Please explain
If sub net mask is 255.255.255.0
600 host id per network is not possible