ExamGecko
Question list
Search
Search

List of questions

Search

Related questions











Question 27 - 212-82 discussion

Report
Export

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 Unkornscan 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.

A.
64
Answers
A.
64
B.
128
Answers
B.
128
C.
255
Answers
C.
255
D.
138
Answers
D.
138
Suggested answer: B

Explanation:

128 is the TTL value that Henry obtained, which indicates that the target OS is Windows. TTL (Time to Live) is a field in the IP (Internet Protocol) header that specifies how long a packet can remain in a network before it is discarded or dropped. TTL is usually expressed in seconds or hops (the number of routers or gateways that a packet passes through). TTL is used to prevent packets from looping endlessly in a network or consuming network resources . Different operating systems have different default TTL values for their packets. By observing the TTL value of a packet from a target system or network, one can infer the operating system of the target . Some common TTL values and their corresponding operating systems are:

64: Linux, Unix, Android

128: Windows

255: Cisco IOS

60: Mac OS

In the scenario, Henry used Nmap tool to discover the OS of the target system. Nmap (Network Mapper) is a tool that can perform various network scanning and enumeration tasks, such as port scanning, OS detection, service identification, etc . Nmap can use various techniques to detect the OS of a target system, such as TCP/IP fingerprinting, which involves analyzing various TCP/IP characteristics of packets from the target system, such as TTL value. In the scenario, Henry obtained a TTL value of 128 , which indicates that the target OS is Windows.

asked 18/09/2024
Justin Kim
37 questions
User
Your answer:
0 comments
Sorted by

Leave a comment first