Certified Ethical Hacker (CEH) — Question 115

Jack was attempting to fingerprint all machines in the network using the following Nmap syntax: invictus@victim_server:~$ nmap -T4 -0 10.10.0.0/24
TCP/IP fingerprinting (for OS scan) xxxxxxx xxxxxx xxxxxxxxx. QUITTING!
Obviously, it is not going through. What is the issue here?

Answer options

• A. OS Scan requires root privileges
• B. The nmap syntax is wrong.
• C. The outgoing TCP/IP fingerprinting is blocked by the host firewall
• D. This is a common behavior for a corrupted nmap application

Correct answer: A

Explanation

The correct answer is A because performing an OS scan with Nmap requires elevated privileges, typically root access. The other options are incorrect as the syntax used is valid, the host firewall is not necessarily blocking the fingerprinting, and a corrupted application would not specifically cause this behavior.