Question:
Which one of the following CIDR prefixes exactly represents the range of IP addresses \(10.12.2.0\) to \(10.12.3.255\)?
Which one of the following CIDR prefixes exactly represents the range of IP addresses \(10.12.2.0\) to \(10.12.3.255\)?
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To find the correct CIDR prefix, calculate the subnet mask and verify the range of IPs it covers.
Updated On: Jan 23, 2025
- \(10.12.2.0/23\)
- \(10.12.2.0/24\)
- \(10.12.0.0/22\)
- \(10.12.2.0/22\)
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The Correct Option is A
Solution and Explanation
The given range is \(10.12.2.0\) to \(10.12.3.255\).
The CIDR notation \(10.12.2.0/23\) has a subnet mask of \(255.255.254.0\), which covers the following range of IPs: \[ 10.12.2.0 \, \text{(start)} \, \text{to} \, 10.12.3.255 \, \text{(end)}. \] Other options do not correctly represent this range:
(B) \(10.12.2.0/24\): Only covers \(10.12.2.0\) to \(10.12.2.255\).
(C) \(10.12.0.0/22\): Covers a larger range from \(10.12.0.0\) to \(10.12.3.255\).
(D) \(10.12.2.0/22\): Invalid as it overlaps incorrectly with the range \(10.12.4.x\). Final Answer: \[ \boxed{\text{(A)}} \]
The CIDR notation \(10.12.2.0/23\) has a subnet mask of \(255.255.254.0\), which covers the following range of IPs: \[ 10.12.2.0 \, \text{(start)} \, \text{to} \, 10.12.3.255 \, \text{(end)}. \] Other options do not correctly represent this range:
(B) \(10.12.2.0/24\): Only covers \(10.12.2.0\) to \(10.12.2.255\).
(C) \(10.12.0.0/22\): Covers a larger range from \(10.12.0.0\) to \(10.12.3.255\).
(D) \(10.12.2.0/22\): Invalid as it overlaps incorrectly with the range \(10.12.4.x\). Final Answer: \[ \boxed{\text{(A)}} \]
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