N10-009 · Question #640
N10-009 Question #640: Real Exam Question with Answer & Explanation
The correct answer is B: /25. To split an existing Class C (/24) network into exactly two separate subnets, you borrow 1 host bit, producing two equal-size subnets. That results in a /25 mask, which divides the original /24 into two halves.
Question
A customer wants to separate the finance department from the marketing department. The network administrator suggests segmenting the existing Class C network into two sections and readdressing all devices appropriately. Which of the following subnet masks should the network administrator use?
Options
- A/24
- B/25
- C/26
- D/27
Explanation
To split an existing Class C (/24) network into exactly two separate subnets, you borrow 1 host bit, producing two equal-size subnets. That results in a /25 mask, which divides the original /24 into two halves.
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