Find DBA for given department consisting of 510 hosts

Question

a) 255.255.255.0

b)255.255.255.254

c) 255.255.254.192

d)255.255.254.255

Comments

Question is wrong. Not possible with class C as maximum hosts possible only are 256.

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@Kapil . Not 256. 2 bits are resreved for subnets.

SO, total hosts possible = 2^6 - 2 = 62