Which of the following statement about neighbor active detection is wrong?

Which of the following statement about neighbor active detection is wrong?
A . The AP periodically sends Probe Request frames with specified multicast addresses on different channels, and the surrounding APs perceive that the AP is a neighbor AP after receiving it.
B . Active detection is mainly used to establish neighbor relationships between legitimate APs
C . Active detection is mainly used to obtain the maximum interference signal strength between legal neighbors, the most important of which is the signal strength of neighbor APs
D . Both active detection and passive detection are used to collect interference from illegal Aps

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Answer: D