Which port number is associated with LDAPS, the secure version of LDAP?

The port number associated with LDAPS, which stands for Lightweight Directory Access Protocol Secure, is TCP port 636. LDAPS is used to encrypt the communications between a client and a server when querying or modifying entries within a directory service, such as Active Directory. By using port 636, LDAPS ensures that the data being transmitted is secured and protected from eavesdropping and man-in-the-middle attacks.

In contrast, TCP port 3389 is primarily used for Remote Desktop Protocol (RDP) connections, which allows users to connect to remote computers for desktop sharing. UDP port 123 is used for the Network Time Protocol (NTP) to synchronize clocks of computer systems over packet-switched, variable-latency data networks. Finally, TCP port 445 is used by Microsoft-DS for sharing files, printers, and other Windows services. Each of these ports serves a different function and does not relate to the secure transmission of directory services, as LDAPS does on port 636.