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N10-009 · Question #654

Which of the following ports is most likely to be used with user authentication?

The correct answer is B. 389. LDAP is commonly used for centralized user authentication and directory services, allowing systems and applications to authenticate users against a directory such as Active Directory. Exam Questions, Study Guides, Practice Tests. Lead the way to help you pass any IT…

Submitted by cyberguy42· Mar 6, 2026Network Security

Question

Which of the following ports is most likely to be used with user authentication?

Options

  • A123
  • B389
  • C443
  • D587

How the community answered

(36 responses)
  • A
    3% (1)
  • B
    89% (32)
  • C
    6% (2)
  • D
    3% (1)

Explanation

LDAP is commonly used for centralized user authentication and directory services, allowing systems and applications to authenticate users against a directory such as Active Directory. Exam Questions, Study Guides, Practice Tests. Lead the way to help you pass any IT Certification exams, 100% Pass Guaranteed or Full Refund. Especially Cisco, Microsoft, CompTIA, Citrix, EMC, HP, Oracle, VMware, Juniper, Check Point, LPI, Nortel, EXIN and so on. Our Slogan: First Test, First Pass. Help you to pass any IT Certification exams at the first try. You can reach us at any of the email addresses listed below. Any problems about IT certification or our products, you could rely upon us, we will give you satisfactory answers in 24 hours.

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