Which of the following ports is the standard for unencrypted Lightweight Directory Access Protocol (LDAP) communications?
53
389
636
443
The standard port for unencrypted Lightweight Directory Access Protocol (LDAP) is TCP port 389. LDAP over SSL/TLS (LDAPS), which is encrypted, uses TCP port 636. Port 53 is used by the Domain Name System (DNS), and port 443 is the standard for Hypertext Transfer Protocol Secure (HTTPS) traffic.
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