Regarding the description of the vulnerability scanning, which of the following is wrong?

Regarding the description of the vulnerability scanning, which of the following is wrong?
A .  Vulnerability scanning is a technology based on network remote monitoring of target network or host security performance vulnerability, which can be used for simulated attack experiments and security audits.
B .  Vulnerability scanning is used to detect whether there is a vulnerability in the target host system. Generally, the target host is scanned for specific vulnerabilities.
C .  Vulnerability scanning is a passive preventive measure that can effectively avoid hacker attacks.
D .  Vulnerability scanning can be done based on the results of ping scan results and port scan

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Answer: C