directory service

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directory service

[də′rek·trē ‚sər·vəs]
(computer science)
A directory of the names and addresses of all the mail recipients on a particular network, which provides electronic mail addresses.
A provider of online directories of Web sites and search engines.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

directory service

(database, networking)
A structured repository of information on people and resources within an organisation, facilitating management and communication.

On a LAN or WAN the directory service identifies all aspects of the network including users, software, hardware, and the various rights and policies assigned to each. As a result applications can access information without knowing where a particular resource is physically located, and users interact oblivious to the network topology and protocols.

To allow heterogeneous networks to share directory information the ITU proposed a common structure called X.500. However, its complexity and lack of seamless Internet support led to the development of Lightweight Directory Access Protocol (LDAP) which has continued to evolve under the aegis of the IETF. Despite its name LDAP is too closely linked to X.500 to be "lightweight".

LDAP was adopted by several companies such as Netscape Communications Corporation (Netscape Directory Server) and has become a de facto standard for directory services. Other LDAP compatible offerings include Novell, Inc.'s Novell Directory Services (NDS) and Microsoft Corporation's Active Directory. The Netscape and Novell products are available for Windows NT and Unix platforms. Novell Directory Services also run on Novell platforms. Microsoft Corporation's Active Directory is an integral part of Microsoft's Windows 2000 and although it can interface with directory services running on other systems it is not available for other platforms.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

directory service

A database that is queried more often than it is updated. Directories tend to be lists of data that may occasionally change but are queried constantly, such as resources in a network (see network directory), contact lists and business directories (Yellow Pages, etc.). See X.500 and LDAP.
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References in periodicals archive ?
Reportedly, the aim of the procurement is to take care of Epiroc Rock Drills' directory services and subcomponents, daily operations, maintenance and support, as well as specialist services for small development and implementations.
Mergers and acquisitions advisor Generational Equity has sold its client, Hanson Directory Service, to DirecTech, LLC, based in Chicago, the company said.
With the acquisition, Eniro looks to stabilise the revenues from its Swedish directory services, the buyer said.
I suspect it is usually reluctance on the part of IT to "permit" business users access to the directory services system.
Mobile Directory Services is driven by the need to provide and offer Namibians a more affordable, more accessible and user friendly telephone directory.
UnboundID Corp, a developer of identity management software, today announced the release of the latest version of its Directory Services Platform, which includes the UnboundID Directory Server, the UnboundID Directory Proxy Server and the UnboundID Synchronization Server.
Etisalat Directory Services, a leading online directory in the UAE, has revamped its local Internet search service portal yellowpages.ae by introducing a plethora of new features.
SECURITY OF THE ACTIVE DIRECTORY DIRECTORY SERVICES
Policelli is an IT consultant who has been honored by Microsoft as an MVP for Directory Services, and he provides instructions for installing and uninstalling the directory, managing functional levels, administering sites and replication, implementing passwords and account lockouts, auditing and safely backing up all Directory files.
iPhone users in the UAE can now find the business service that they require as well as call, email and browse company listings from the palm of their hand thanks to a new Yellow Pages application which is being launched today by Etisalat Directory Services in partnership with Al Wahda Express.
In the spring, NMCI rolled out a new GAL that synchronizes NMCI with the Defense Information Systems Agency's (DISA) Joint Enterprise Directory Services. JEDS houses the contact information for personnel in the Army, Air Force, Coast Guard, Marine Corps, Navy Bureau of Medicine and Surgery (BUMED), the Integrated Shipboard Network System (IT-21/ISNS), as well as other Defense agencies.

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