According to the CHFI v11 objectives underNetwork ForensicsandWireless Network Security, investigators must be able todiscover, analyze, and visualize wireless network activitywhen assessing potential threats such as rogue access points, weak encryption, or signal leakage beyond controlled premises.NetSurveyoris a specialized wireless network discovery and diagnostic tool designed precisely for this purpose.

NetSurveyor passively detects nearby wireless access points and displays real-time information such asSSID (AP name), signal strength, channel usage, encryption type, and MAC addresses. One of its key strengths—explicitly aligned with CHFI training—is its ability to present this data usinggraphical charts and diagnostic views, making it easier for investigators to identify abnormal signal patterns, unauthorized APs, or overlapping channels that may indicate security weaknesses or malicious activity.

The other options are not suitable for wireless network assessment.John the Ripperandhashcatare password-cracking tools used in credential analysis, not network visualization.Netcraftis primarily used for website and server footprinting, not real-time wireless network monitoring.

The CHFI Exam Blueprint v4 emphasizesinvestigating wireless network traffic, detecting rogue access points, and performing attack and vulnerability monitoring, all of which require tools like NetSurveyor. Therefore, NetSurveyor is the most appropriate and exam-aligned tool for this scenario