CompTIA
N10-009 · Question #471
A network technician is designing a LAN for a new facility. The company is expecting more than 300 devices to connect to the network. Which of the following masks will provide the most efficient…
The correct answer is C. 255.255.254.0. A /23 subnet (255.255.254.0) provides 510 usable host addresses, which comfortably covers 300+ devices with minimal address waste compared to much larger masks like /18 or /16.
Submitted by eva_at· Mar 6, 2026Network implementation
Question
A network technician is designing a LAN for a new facility. The company is expecting more than 300 devices to connect to the network. Which of the following masks will provide the most efficient subnet?
Options
- A255.255.0.0
- B255.255.192.0
- C255.255.254.0
- D255.255.255.254
How the community answered
(16 responses)- A13% (2)
- B6% (1)
- C75% (12)
- D6% (1)
Explanation
A /23 subnet (255.255.254.0) provides 510 usable host addresses, which comfortably covers 300+ devices with minimal address waste compared to much larger masks like /18 or /16.
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