CompTIA PenTest+ (PT0-002) — Question 179

During the reconnaissance phase, a penetration tester obtains the following output:

Reply from 192.168.1.23: bytes=32 time<54ms TTL=128
Reply from 192.168.1.23: bytes=32 time<53ms TTL=128
Reply from 192.168.1.23: bytes=32 time<60ms TTL=128
Reply from 192.168.1.23: bytes=32 time<51ms TTL=128

Which of the following operating systems is MOST likely installed on the host?

Answer options

Correct answer: C

Explanation

The output shows a consistent TTL of 128, which is a common default for Windows operating systems. Other systems, such as Linux and macOS, typically use different default TTL values, making them less likely to produce this output pattern. Therefore, Windows is the most probable operating system for the host based on this information.