You have subnetted a Class C address space of 22055660 using

You have subnetted a Class C address space of 220.55.66.0 using a subnet mask of 255.255.255.192. What is the useable address range for the first subnet?

A. 220.55.66.0 to 220.55.66.63

B. 220.55.66.0 to 220.55.66.62

C. 220.55.66.1 to 220.55.66.63

D. 220.55.66.1 to 220.55.66.62

Solution

The number of total available hosts on a subnet is 2^h-2, where h is the number of bits used for the host portion of the address.
So, for the above question

255.255.255.192   11000000 2 6 2 62

Now, you can easily figure out the correct option (D)