Security+ Question of the Week: LDAP Port

LDAP is based on x.500 standard naming conventions, is an Internet standard and uses which of the following ports?

A. TCP 389 and 636
B. TCP 443 and 465
C. UDP 53
D. UDP 1492

Reveal Answer

The correct answer is A.

LDAP uses TCP ports 389 for plain-text and 636 for TLS encrypted communications. TCP 443 is used by HTTPS and TCP 465 by SMTPS. UDP 53 is used for DNS queries. UDP 1492 is not used by a well-known application or service. Instead, this was crafted to trick you in to thinking of RFC 1492 which defined the original TACACS before Cisco developed their two customized proprietary versions of it called XTACACS and TACACS+.

 

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Security+ Certification Boot Camp (SY0-401)

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