Certified Ethical Hacker (CEH v11) — Question 221

Allen, a professional pen tester, was hired by XpertTech Solutions to perform an attack simulation on the organization's network resources. To perform the attack, he took advantage of the NetBIOS API and targeted the NetBIOS service. By enumerating NetBIOS, he found that port 139 was open and could see the resources that could be accessed or viewed on a remote system. He came across many NetBIOS codes during enumeration.
Identify the NetBIOS code used for obtaining the messenger service running for the logged-in user?

Answer options

• A. <00>
• B. <20>
• C. <03>
• D. <1B>

Correct answer: C

Explanation

The correct answer is <03>, which is the NetBIOS code used to access the messenger service for the logged-in user. The other options, such as <00>, are used for the workstation service, <20> is used for file and printer sharing, and <1B> is for domain master browser, none of which relate to the messenger service.