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PT0-002 · Question #617

PT0-002 Question #617: Real Exam Question with Answer & Explanation

The correct answer is C: Windows. The open ports observed in the Nmap scan suggest the target system is running a Windows OS. Key ports that indicate a Windows system include: - 139 (NetBIOS Session Service) and 445 (SMB - Server Message Block): These ports are commonly associated with Windows file and printer sh

Reconnaissance and enumeration

Question

An assessor notes the following TCP ports discovered after an Nmap scan: 21, 23, 25, 80, 110, 139, 443, 445, 3389 Which of the following OSs is the target most likely using?

Options

  • AManjaro
  • BCentOS
  • CWindows
  • DiOS

Explanation

The open ports observed in the Nmap scan suggest the target system is running a Windows OS. Key ports that indicate a Windows system include: - 139 (NetBIOS Session Service) and 445 (SMB - Server Message Block): These ports are commonly associated with Windows file and printer sharing. - 3389 (RDP - Remote Desktop Protocol): This is the default port for remote desktop access, which is primarily used in Windows environments. While ports like 21 (FTP), 23 (Telnet), 25 (SMTP), 80 (HTTP), 110 (POP3), and 443 (HTTPS) are more general and can be found on various OSs, the presence of 139, 445, and 3389 strongly suggests a Windows machine.

Topics

#Port Scanning#OS Fingerprinting#Service Enumeration#Windows Services

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