LDAP (Lightweight Directory Access Protocol) uses port 389 for standard connections and port 636 for LDAP over SSL (LDAPS), which secures directory service communication.
Breakdown of Options:
A. 22 – SSH port, not used for directory services.
B. 389 – Used for LDAP, but not encrypted.
C. 445 – Used for SMB file sharing, not LDAP.
D. 636 – Correct answer. LDAPS (LDAP over SSL/TLS) secures directory authentication.
[Reference:, CompTIA Network+ (N10-009) Official Study Guide – Domain 3.1: Compare and contrast network protocols., RFC 4511: Lightweight Directory Access Protocol (LDAP), , , , , , , ]
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