169 lines
3.3 KiB
HTML
169 lines
3.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>What's LDAP ?</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="LDAP Linux HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Introduction"
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HREF="introduction.html"><LINK
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REL="PREVIOUS"
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TITLE="Introduction"
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HREF="introduction.html"><LINK
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REL="NEXT"
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TITLE="How does LDAP work ?"
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HREF="howitworks.html"></HEAD
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><BODY
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CLASS="section"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>LDAP Linux HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="introduction.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 1. Introduction</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="howitworks.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="section"
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><H1
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CLASS="section"
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><A
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NAME="WhatisLdap"
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></A
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>1.1. What's LDAP ?</H1
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><P
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>LDAP stands for Lightweight Directory Access Protocol. As the name suggests,
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it is a lightweight client-server protocol for accessing directory services, specifically X.500-based directory
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services. LDAP runs over TCP/IP or other connection oriented transfer services.
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LDAP is defined in <A
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HREF="ftp://ftp.isi.edu/in-notes/rfc2251.txt"
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TARGET="_top"
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>RFC2251</A
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> "The Lightweight Directory Access Protocol (v3).</P
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><P
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>A directory is similar to a database, but tends to contain more descriptive,
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attribute-based information. The information in a directory is generally read
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much more often than it is written. Directories are tuned to give quick-response to
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high-volume lookup or search operations. They may have the ability to replicate
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information widely in order to increase availability and reliability, while reducing
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response time. When directory information is replicated, temporary inconsistencies
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between the replicas may be OK, as long as they get in sync eventually.</P
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><P
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>There are many different ways to provide a directory service. Different methods
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allow different kinds of information to be stored in the directory, place
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different requirements on how that information can be referenced, queried and
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updated, how it is protected from unauthorized access, etc. Some directory
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services are local, providing service to a restricted context (e.g., the finger
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service on a single machine). Other services are global, providing service to
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a much broader context.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="introduction.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="howitworks.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Introduction</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="introduction.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>How does LDAP work ?</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |