Which of the following is a directory service protocol that defines how a client can access information and perform operations?

LDAP

Explanation:

LDAP or light weight directory access protocol is used to create an open protocol for interfacing and querying information in a directory in an operating system. Ordinarily, it does not support authentication of users accessing the directory, but can be configured. The queried information are sent in clear text.

yes you can contact there email

answeroperating system;