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Question 288 - CAS-004 discussion

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A security analyst is reviewing a new IOC in which data is injected into an online process. The IOC shows the data injection could happen in the following ways:

* Five numerical digits followed by a dash, followed by four numerical digits; or

* Five numerical digits

When one of these IOCs is identified, the online process stops working. Which of the following regular expressions should be implemented in the NIPS?

A.
^\d{4}(-\d{5})?$
Answers
A.
^\d{4}(-\d{5})?$
B.
^\d{5}(-\d{4})?$
Answers
B.
^\d{5}(-\d{4})?$
C.
^\d{5-4}$
Answers
C.
^\d{5-4}$
D.
^\d{9}$
Answers
D.
^\d{9}$
Suggested answer: B
asked 02/10/2024
Gennadiy Volkov
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