Which port is used by LDAP?

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Prepare for the CPSA Port Numbers exam with multiple choice questions and detailed explanations. Understand key protocols and services to excel in your test.

Multiple Choice

Which port is used by LDAP?

Explanation:
LDAP uses port 389 by default for plain, non-encrypted directory traffic. When you need encryption, you can use LDAPS over 636 or upgrade an existing session to TLS on 389 with StartTLS. The other ports correspond to different services: 143 is used by IMAP for email retrieval, and 500 is used for IPsec/IKE in VPN setups. So the port most associated with LDAP is 389.

LDAP uses port 389 by default for plain, non-encrypted directory traffic. When you need encryption, you can use LDAPS over 636 or upgrade an existing session to TLS on 389 with StartTLS. The other ports correspond to different services: 143 is used by IMAP for email retrieval, and 500 is used for IPsec/IKE in VPN setups. So the port most associated with LDAP is 389.

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