What is the prefix length notation for the subnet mask 255.255.255.224?

What is the prefix length notation for the subnet mask 255.255.255.224?

• /25
• /26
• /27
• /28

Explanation: The binary format for 255.255.255.224 is 11111111.11111111.11111111.11100000. The prefix length is the number of consecutive 1s in the subnet mask. Therefore, the prefix length is /27.

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