LDAP

LDAP stands for Lightweight Directory Access Protocol and allows users to find information about people, companies, devices, and files, whether on a public network or private intranet. Companies use directories to store information like email addresses, usernames, and passwords and LDAP helps access and maintain that data.

For an LDAP query to go through, a user has to connect to a server through an LDAP port, send a request, receive a response, and disconnect from the port.