Answer / ravin vasani

Hello,

Lightweight Directory Access Protocol (LDAP), is an Internet
protocol that email and other programs use to look up
information from a server.

LDAP is must be used to connect to Linux server.

Now we discuss LDAP in brief:-

PAM must be the most common one, simple method, as the
module connects to the server, requests data from it or
sends data to the server which is then matched with the
according entry.

Next is NSS-Library, which is used by the libc functions. it
was implemented in libc5 with NYS support and is a standard
in libc6 systems, which makes it pretty much a standard in
newly installed systems.

Built in access methods in various programs. Programs such
as ProFTPd and some POP3 servers have built in support for
LDAP. It may or may not be more efficient than the PAM and
NSS solutions.

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