EC-Council
312-50V12 · Question #147
A skilled ethical hacker was assigned to perform a thorough OS discovery on a potential target. They decided to adopt an advanced fingerprinting technique and sent a TCP packet to an open TCP port wit
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Submitted by chen.hong· Mar 4, 2026Reconnaissance Techniques
Question
A skilled ethical hacker was assigned to perform a thorough OS discovery on a potential target. They decided to adopt an advanced fingerprinting technique and sent a TCP packet to an open TCP port with specific flags enabled. Upon receiving the reply, they noticed the flags were SYN and ECN-Echo. Which test did the ethical hacker conduct and why was this specific approach adopted?
Options
- ATest 3: The test was executed to observe the response of the target system when a packet with
- BTest 2: This test was chosen because a TCP packet with no flags enabled is known as a NULL
- CTest 1: The test was conducted because SYN and ECN-Echo flags enabled to allow the hacker to
- DTest 6: The hacker selected this test because a TCP packet with the ACK flag enabled sent to a
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Topics
#OS fingerprinting#TCP flags#network scanning#ECN-Echo