Which access policy item allows querying an external LDAP directory for authentication?

Question

Options

• ARADIUS Auth
• BAD Auth
• CLDAP Auth
• DOCSP Auth

• A
  5% (2)
• B
  3% (1)
• C
  90% (36)
• D
  3% (1)

Explanation

LDAP Auth (option C) is correct because LDAP (Lightweight Directory Access Protocol) is the standard protocol specifically designed for querying and authenticating against directory services - including external ones - making it the exact fit for this use case.

Why the distractors are wrong:

• A. RADIUS Auth - RADIUS is a network protocol for centralized authentication (common in VPNs and Wi-Fi), not for querying directory services directly.
• B. AD Auth - Active Directory Auth integrates with Microsoft AD specifically, but AD itself uses LDAP under the hood; this option is a Microsoft-specific implementation, not the general external LDAP protocol.
• D. OCSP Auth - OCSP (Online Certificate Status Protocol) is used to check whether a digital certificate has been revoked - it has nothing to do with directory-based authentication.

Memory tip: Think "LDAP = Lookup Directory And Permit" - its whole purpose is looking up users in a directory to authenticate them. If the question mentions an external directory, LDAP is your answer.

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