Which of the following answers lists the prefix (CIDR) format equivalent of 255.255.254.0?
- /19
- /20
- /23
- /24
- /25
Explanation: If you think about the conversion one octet at a time, the first two octets each convert to 8 binary 1s. 254 converts to 8-bit binary 11111110, and decimal 0 converts to 8-bit binary 00000000. So, the total number of binary 1s (which defines the prefix length) is 8 + 8 + 7 + 0 = /23.
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