As part of a security audit, Johnny is conducting a port scan of a network. He notes that the domain controller is utilizing secure LDAP. Which of the following ports would indicate this finding?

By default, Secure Lightweight Directory Access Protocol (LDAPS) operates on port 636. Port 53 is used by DNS, port 389 is used by LDAP, and port 443 is used by secure HTTP.

• Port 636: This is the default port used for Secure Lightweight Directory Access Protocol (LDAPS), which is a protocol used to access directory services like Active Directory over a secure SSL/TLS connection.
• Port 53: This is the default port used by the Domain Name System (DNS), which is a protocol used to translate domain names into IP addresses and vice versa.
• Port 389: This is the default port used by the Lightweight Directory Access Protocol (LDAP), which is a protocol used to access and modify directory services like Active Directory.
• Port 443: This is the default port used by HTTPS (Hypertext Transfer Protocol Secure), which is a protocol used for secure communication over the internet. It uses SSL/TLS encryption to protect sensitive data, such as login credentials and payment information, from being intercepted by unauthorized parties.

While these ports are commonly associated with these protocols, they can be configured to use different ports as well. Additionally, some protocols have other default ports associated with them, depending on the specific implementation or configuration.