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John works as a professional Ethical Hacker.

John works as a professional Ethical Hacker. He is assigned a project to test the security of www.we-are-secure.com. You have searched all open ports of the we-are-secure server. Now, you want to perform the next information-gathering step, i.e., passive OS fingerprinting. Which of the following tools can you use to accomplish the task?

A.

NBTscan

B.

Nmap

C.

P0f

D.

Superscan

GIAC GCFW Summary

  • Vendor: GIAC
  • Product: GCFW
  • Update on: Jul 25, 2025
  • Questions: 391
Price: $52.5  $149.99
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