CompTIA Security+ (SY0-401) — Question 9

Which of the following would the security engineer set as the subnet mask for the servers below to utilize host addresses on separate broadcast domains?

Server 1: 192.168.100.6 -

Server 2: 192.168.100.9 -

Server 3: 192.169.100.20 -

Answer options

• A. /24
• B. /27
• C. /28
• D. /29
• E. /30

Correct answer: D

Explanation

The correct answer is D (/29) because it provides 6 usable IP addresses, which allows the servers to reside in separate broadcast domains. The other options either provide too many addresses or do not offer enough separation for the given servers.