6.5 KB · ⇊ 5 parts · ⤓ Micron 6.5 KB · ⤓ HTML 15.2 KB

top

A Directory System Agent (DSA) is the element of an X.500 directory service that provides User Agents with access to a portion of the directory (usually the portion associated with a single Organizational Unit).cite-ref-blum1989-1-0[1]cite-ref-taribukhres2001-2-0[2]cite-ref-javvin1-3-0[3] X.500 is an international standard developed by the International Organization for Standardization (ISO), and the International Telecommunication Union (ITU-T). The model and function of a directory system agent are specified in ITU-T Recommendation X.501.

• Active Directory

• References

• RFCs

In Microsoft's Active Directory the DSA is a collection of servers and daemon processes that run on Windows Server systems that provide various means for clients to access the Active Directory data store.cite-ref-microsoft1-4-0[4]cite-ref-microsoft2-5-0[5]

Clients connect to an Active Directory DSA using various communications protocols:

• LDAP version 3.0—used by Windows 2000 and Windows XP clientscite-ref-microsoft1-4-1[4]cite-ref-microsoft2-5-1[5]

• LDAP version 2.0cite-ref-microsoft1-4-2[4]cite-ref-microsoft2-5-2[5]

• Security Account Manager (SAM) interface—used by Windows NT clientscite-ref-microsoft1-4-3[4]cite-ref-microsoft2-5-3[5]

• MAPI RPC interface—used by Microsoft Exchange Server and other MAPI clientscite-ref-microsoft1-4-4[4]cite-ref-microsoft2-5-4[5]

• A proprietary RPC interface—used by Active Directory DSAs to communicate with one another and replicate data amongst themselvescite-ref-microsoft1-4-5[4]cite-ref-microsoft2-5-5[5]

cite-note-blum1989-11. ↑ citerefdaniel-blum1989Daniel Blum (1989-10-30). "Details of X.500 architecture". Network World. 6 (43). IDG Network World Inc: 58. ISSN 0887-7661.

cite-note-taribukhres2001-22. ↑ citerefzahir-tari-and-omran-bukhres2001Zahir Tari and Omran Bukhres (2001). Fundamentals of distributed object systems: the CORBA perspective. Parallel and distributed computing. Vol. 8. John Wiley and Sons. p. 219. ISBN 978-0-471-35198-6.

cite-note-javvin1-33. ↑ "X.500: Directory Access Protocol (DAP)". Javvin Technologies, Inc. Archived from the original on 2005-11-23. Retrieved 2005-09-22.

cite-note-microsoft1-44. ↑ "Platform SDK: Active Directory: Directory System Agent". MSDN. Microsoft. Archived from the original on 2005-05-27. Retrieved 2005-09-22.

cite-note-microsoft2-55. ↑ "Active Directory: Active Directory Diagnostics, Troubleshooting, and Recovery: Summary of Active Directory Architecture: Directory System Agent". Windows 2000 Server Resource Kit. Microsoft. Retrieved 2010-10-02.

• RFC 2148 — Deployment of the Internet White Pages Service