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?
The ICMP ping replies show a TTL (Time To Live) value of 128, which is the default value for packets originating from Windows operating systems. Different operating systems have distinct default TTL values: Windows generally uses 128, while Linux, macOS, and other Unix-based systems typically use lower TTL values, such as 64. Consequently, the host is most likely running Windows.
128 is the default TTL (time to live) value for most Windows distros.
thanks
C. Windows Explanation: The output provided shows ICMP ping replies with a TTL (Time To Live) value of 128. Different operating systems have different default TTL values for ICMP packets. Here are the typical default TTL values for various operating systems: • Windows: 128 • Linux: 64 • macOS: 64 • NetBSD: 64 (similar to other Unix-based systems)