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EC-Council

312-50V12 · Question #164

You are an ethical hacker tasked with conducting an enumeration of a company's network. Given a Windows Answered Marked for Review 37.6% system with NetBIOS enabled, port 139 open, and file and…

The correct answer is A. Switch to an enumeration tool that supports IPv6. To enumerate NetBIOS names on an IPv6 network, nbtstat is unsuitable for remote queries, necessitating the use of a different enumeration tool that supports IPv6.

Submitted by kwame.gh· Mar 4, 2026Reconnaissance Techniques

Question

You are an ethical hacker tasked with conducting an enumeration of a company's network. Given a Windows Answered Marked for Review 37.6% 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 IPv6 for its network. Which of the following actions should you take next?

Options

  • ASwitch to an enumeration tool that supports IPv6
  • BUse nbtstat -a followed by the IPv6 address of the target machine
  • CUse nbtstat -c to get the contents of the NetBIOS name cache
  • DUtilize Nmap Scripting Engine (NSE) for NetBIOS enumeration

How the community answered

(28 responses)
  • A
    79% (22)
  • B
    11% (3)
  • C
    4% (1)
  • D
    7% (2)

Why each option

To enumerate NetBIOS names on an IPv6 network, `nbtstat` is unsuitable for remote queries, necessitating the use of a different enumeration tool that supports IPv6.

ASwitch to an enumeration tool that supports IPv6Correct

`nbtstat` is a legacy command-line tool primarily designed for NetBIOS over TCP/IP (NBT) which operates over IPv4 and does not inherently support querying NetBIOS names across IPv6 addresses for remote enumeration. Therefore, an ethical hacker must switch to a modern enumeration tool that is compatible with IPv6 to perform NetBIOS or similar service enumeration.

BUse nbtstat -a followed by the IPv6 address of the target machine

`nbtstat` is a legacy command-line tool primarily designed to work with NetBIOS over TCP/IP (NBT) and relies on IPv4 for remote enumeration; it cannot be used directly with an IPv6 address to enumerate NetBIOS names on a target machine.

CUse nbtstat -c to get the contents of the NetBIOS name cache

While `nbtstat -c` displays the local NetBIOS name cache, this command does not perform network enumeration of NetBIOS names on a remote system, which is the objective, nor does it address the incompatibility of `nbtstat` with IPv6 for remote lookups.

DUtilize Nmap Scripting Engine (NSE) for NetBIOS enumeration

While Nmap Scripting Engine (NSE) can indeed perform NetBIOS enumeration and supports IPv6, the primary issue is `nbtstat`'s lack of IPv6 support for remote enumeration, making a broader switch to any IPv6-compatible tool the more direct and general next step rather than specifically suggesting Nmap.

Concept tested: NetBIOS enumeration tool compatibility with IPv6

Topics

#NetBIOS enumeration#IPv6#nbtstat#network scanning

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