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EC-Council

312-50V13 · Question #509

You are an ethical hacker tasked with conducting an enumeration of a company's network. Given a Windows system with NetBIOS enabled, port 139 open, and file and printer sharing active, you are about t

The correct answer is D. Switch to an enumeration tool that supports IPv6. Explanation Switching to an IPv6-compatible enumeration tool is necessary because nbtstat is designed exclusively for IPv4 networks and cannot resolve or communicate with IPv6 addresses, making it functionally useless in this scenario. Option A is incorrect because nbtstat -c onl

Submitted by paula_co· Mar 6, 2026Enumeration

Question

You are an ethical hacker tasked with conducting an enumeration of a company's network. Given a Windows system with NetBIOS enabled, port 139 open, and file and printer sharing active, you are about to run some nbtstat commands to enumerate NetBIOS names. The company uses |Pv6 for its network. Which of the following actions should you take next?

Options

  • AUse nbtstat -c to get the contents of the NetBIOS name cache
  • Buse nbtstat -a followed by the IPv6 address of the target machine
  • CUtilize Nmap Scripting Engine (NSE) for NetBIOS enumeration
  • DSwitch to an enumeration tool that supports IPv6

How the community answered

(28 responses)
  • A
    7% (2)
  • B
    14% (4)
  • C
    4% (1)
  • D
    75% (21)

Explanation

Explanation

Switching to an IPv6-compatible enumeration tool is necessary because nbtstat is designed exclusively for IPv4 networks and cannot resolve or communicate with IPv6 addresses, making it functionally useless in this scenario. Option A is incorrect because nbtstat -c only displays the local NetBIOS name cache and doesn't actively enumerate a remote target at all. Option B is incorrect because nbtstat -a accepts a hostname or IPv4 address as its argument - it does not support IPv6 address syntax, so the command would simply fail. Option C, while Nmap NSE is a powerful tool, is not the most direct next step compared to selecting a purpose-built IPv6-compatible enumeration tool, and the question emphasizes addressing the IPv6 compatibility gap as the primary obstacle.

Memory Tip: Think of it this way - "Old tools, old rules." nbtstat was built in the IPv4 era and never got an IPv6 upgrade. Whenever you see IPv6 + NetBIOS enumeration, your first thought should be: "nbtstat won't work here - I need a modern, IPv6-aware tool." The protocol mismatch is always the blocker.

Topics

#NetBIOS Enumeration#IPv6#nbtstat#Enumeration Tools

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