If the user cannot communicate with 192.168.10.1, they might be on a different subnet. Changing the subnet mask to 255.255.255.0 ensures the user and the file server are in the same subnet.
Breakdown of Options:
A. Changing the IPv4 address to 192.168.10.1 – This would conflict with the server's IP.
B. Changing the subnet mask to 255.255.255.0 – ✅ Correct answer. Ensures both the user and the server are on the same subnet.
C. Changing the DNS servers – DNS does not affect local network connectivity.
D. Changing the physical address – The MAC address does not impact subnet communication.
[Reference:, CompTIA Network+ (N10-009) Official Study Guide – Domain 2.4: Explain subnetting and addressing concepts., , ]
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