Q
"Which of the following subnet masks are represented with the CIDR of / 27?
A. 255.255.255.254
B. 255.255.255.248
C. 255.255.255.224
D. 255.255.255.240"
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Answer
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Step 1: Understand the problem and recognize that we need to find the subnet mask represented with the CIDR of / 27.
A subnet mask is a number that defines a range of IP addresses that can be used in a network. The CIDR notation (Classless Inter-Domain Routing) is a way to represent the subnet mask using a dot-decimal notation followed by a slash and the number of leading 1 -bits (n) in the subnet mask (e.g., / 27). To find the subnet mask, we need to convert the given CIDR notation to a dotted-decimal format.
Step 2: Convert the CIDR notation (/ 27) to a binary format.
In the CIDR notation / 27, the number 27 indicates the number of leading 1 -bits in the subnet mask. To convert this to a binary format, we write 27 consecutive 1s followed by the remaining 25 bits as 0s: 11111111 11111111 11111111 11100000
Final Answer
The subnet mask represented with the CIDR of / 27 is 255.255.255.240.
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