When attempting an operating system fingerprinting scan, NMap requires which of the following?
A) An open port
B) Specific services like HTTP on the target since OS detection is basically a banner grab
C) A packet filtering firewall between the scanner and the target
D) One open port and one closed port

Question

Quizplus · Accepted Answer

NMap has an extensive database of signatures for the peculiarities of various operating systems. An OS detection scan performs a series of tests that involve sending packets to an open and a closed port and then analyzing the return traffic against the signature database.

When Attempting an Operating System Fingerprinting Scan, NMap Requires Which