100-150 Question 88
Single answerA network administrator is configuring a subnet for a new department in their organization. They assign the network prefix 192.168.10.0/24. Which of the following statements about this prefix and its related addressing is correct?
- A
The /24 prefix indicates there are 256 possible host addresses in this subnet.
- B
The /24 prefix indicates that the subnet mask is 255.255.255.0.
- C
This prefix is part of the public IP address range.
- D
The /24 prefix allows for 254 usable host addresses in this subnet.
Show answer and explanation
Correct answer: B
Explanation
The /24 prefix notation indicates that the first 24 bits of the IP address are used for the network portion, and the remaining 8 bits are used for host addresses. This corresponds to a subnet mask of 255.255.255.0. While the /24 prefix allows for 256 total addresses, only 254 are usable for hosts because one address is reserved for the network and one for broadcast.
- A. Incorrect.
This statement is incorrect. While the /24 prefix does provide 256 total addresses, only 254 are usable for hosts due to the network and broadcast addresses being reserved.
- B. Correct.
This is correct. A /24 prefix corresponds to a subnet mask of 255.255.255.0, as it reserves the first 24 bits for the network portion of the address.
- C. Incorrect.
This is incorrect. The prefix 192.168.10.0/24 is part of the private IP address range, not the public IP address range.
- D. Incorrect.
This statement is partially correct but not the best answer. While the /24 prefix does allow for 254 usable host addresses, this is not the primary definition of the prefix itself.