Mask Conversion Problem 9: Answer
The answer is 255.255.252.0.
For problem 9, with a prefix of /22, you start at Step 1 by writing down 22 binary 1s, as shown here:
11111111 11111111 111111
At Step 2, you add binary 0s until you have 32 total bits, as shown next:
11111111 11111111 11111100 00000000
The only remaining work is to convert this 32-bit number to decimal, remembering that the conversion works with 8 bits at a time.
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