Which of the following answers lists the prefix (CIDR) format equivalent of 255.255.255.240?
- /26
- /28
- /27
- /30
- /29
Explanation: If you think about the conversion one octet at a time, the first three octets each convert to 8 binary 1s. 240 converts to 8-bit binary 11110000, so the total number of binary 1s (which defines the prefix length) is 8 + 8 + 8 + 4 = /28.
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