If you combine security defense with big data technology, which of the following statements are...

In the learning process, you should start from collecting samples, analyze their characteristics and then perform machine learning.

Machine learning only counts a large number of samples, which is convenient for security administrators to view.

In the detection process, the characteristics of unknown samples need to be extracted and calculated to provide samples for subsequent static comparisons.

Security source data can come from many places, including data streams, messages, threat events, logs, etc.