LDAP over SSL uses which port? (alternative item)

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Prepare for the CPSA Port Numbers Exam with quizzes on port numbers, services, and protocols. Each question is accompanied by hints and detailed explanations. Get exam-ready with our comprehensive study tool!

Multiple Choice

LDAP over SSL uses which port? (alternative item)

Explanation:
LDAP over SSL uses port 636. The secure version of LDAP starts TLS/SSL immediately as the connection is established, which is what LDAPS on 636 does. In contrast, the standard LDAP service runs on port 389 and, unless you use StartTLS on that port, traffic isn’t encrypted. The other ports listed correspond to different services (for example, 143 is commonly used by IMAP, and 500 is associated with IPsec/IKE), so they don’t apply to LDAP over SSL.

LDAP over SSL uses port 636. The secure version of LDAP starts TLS/SSL immediately as the connection is established, which is what LDAPS on 636 does. In contrast, the standard LDAP service runs on port 389 and, unless you use StartTLS on that port, traffic isn’t encrypted. The other ports listed correspond to different services (for example, 143 is commonly used by IMAP, and 500 is associated with IPsec/IKE), so they don’t apply to LDAP over SSL.

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