EC-Council
312-50V12 · Question #57
Henry is a cyber security specialist hired by BlackEye - Cyber Security Solutions. He was tasked with discovering the operating system (OS) of a host. He used the Unicornscan tool to discover the OS…
The correct answer is A. 128. The default TTL value for Windows OS is 128. This means that when a packet is sent from a Windows machine, it will have a TTL value of 128. If the packet reaches a router or firewall that has a TTL value of less than 128, the packet will be discarded.
Submitted by helene.fr· Mar 4, 2026Reconnaissance Techniques
Question
Henry is a cyber security specialist hired by BlackEye - Cyber Security Solutions. He was tasked with discovering the operating system (OS) of a host. He used the Unicornscan tool to discover the OS of the target system. As a result, he obtained a TTL value, which indicates that the target system is running a Windows OS. Identify the TTL value Henry obtained, which indicates that the target OS is Windows.
Options
- A128
- B255
- C64
- D138
How the community answered
(50 responses)- A92% (46)
- B2% (1)
- C4% (2)
- D2% (1)
Explanation
The default TTL value for Windows OS is 128. This means that when a packet is sent from a Windows machine, it will have a TTL value of 128. If the packet reaches a router or firewall that has a TTL value of less than 128, the packet will be discarded.
Topics
#OS fingerprinting#Reconnaissance#Network scanning#TTL values
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