While analyzing suspicious network activity, you observe a slow, stealthy scanning technique that is difficult...

According to the CEH Network Scanning module, Idle Scanning (Zombie Scanning) is one of the most stealthy reconnaissance techniques. In this method, the attacker uses an idle third-party host (zombie) to probe the target indirectly.

Because all scan packets appear to originate from the zombie system, the true attacker remains hidden. CEH highlights that idle scans:

Are extremely stealthy

Generate minimal traffic from the attacker

Make attribution very difficult

Option B is correct.

Option A (FIN scan) is stealthy but still traceable.

Option C is noisy and easily detected.

Option D describes a Xmas scan, which is detectable.

CEH classifies idle scanning as one of the hardest scanning techniques to trace.