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?
The requirement is to support over 300 hosts. The subnet mask 255.255.254.0 (or /23) provides 512 addresses, 510 of which are usable — ideal for around 300 devices.
255.255.255.254 is invalid for host assignments (only 2 addresses, 0 usable).
From Andrew Ramdayal’s guide:
“To support 300 hosts, a /23 subnet (255.255.254.0) offers 510 usable addresses — the most efficient choice without excessive overhead.”
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