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Question 153 - N10-008 discussion

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A client moving into a new office wants the IP network set up to accommodate 412 network- connected devices that are all on the same subnet. The subnet needs to be as small as possible. Which of the following subnet masks should be used to achieve the required result?

A.
255.255.0.0
Answers
A.
255.255.0.0
B.
255.255.252.0
Answers
B.
255.255.252.0
C.
255.255.254.0
Answers
C.
255.255.254.0
D.
255.255.255.0
Answers
D.
255.255.255.0
Suggested answer: B

Explanation:

255.255.252.0 is a subnet mask that allows for 1022 network-connected devices on the same subnet, which is the smallest subnet that can accommodate 412 devices. The subnet mask determines how many bits are used for the network portion and how many bits are used for the host portion of an IP address. A smaller subnet mask means more bits are used for the network portion and less bits are used for the host portion, which reduces the number of available hosts on the subnet. 255.255.0.0 allows for 65534 hosts on the same subnet, which is too large. 255.255.254.0 allows for 510 hosts on the same subnet, which is also too large. 255.255.255.0 allows for 254 hosts on the same subnet, which is too small.

asked 02/10/2024
Yi-Jen Tung
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