Lightweight Directory Access Protocol

In computer science LDAP (Lightweight Directory Access Protocol) it is a protocol standard for the interrogation and the modification of the services of directory. In the years seventy integration between the world of the communication and the computer science technologies traced the road towards the development of new technologies of communication. Many between the systems develop to you were incompatible between of they: divenne obvious that was necessary standard that they allowed to equipment and it arranges different to cooperate. They came develops two main standards independently to you. One came devised from the CCITT (Comite Consultatif International Telephonique ET Telegraphique, or International Consultative Committee on Telephony and Telegraphy), and fromthe ISO. CCITT divenne then ITU-T. The job produced to OSI Reference Model (ISO the 7498), that it more low characterized seven layers in the communication of data with the physical transport to the level, and protocols of the application to the higher levels. The other standards were developed ahead with with Internet and the search capacity from the DARPA in the USA. The Internet Architecture Board (IAB) and Internet Engineering Task Force (IETF), develop standard for Internet with a document series call Request For Comments to you (RFC), than after to be it approves of to you, it implements to you and used for a sure period, they can become standard (STD). Before that one proposed becomes a RFC, is called Internet Draft.

These two processes of standardization face the problem from two perspective different. The approach DARES begins from zero and defines standard using a formal model without to demand implementazioni. Internet uses a less formal approach, where anyone can propose and to comment RFC that comes then implements to you in order to verify of the feasibility. The protocols DARE are develop to you slowly, especially in the market of personal the computers. To contrary TCP/IP and Internet they have had a greater application and they are develops to you quickly. Some companies developed therefore to the own protocols and products for the network. In any case the protocols DARE had importance in the large distributed systems that they were being developed in particular way. An important area was that one of the services of directory. The CCITT created standard X.500 in 1988, than divenne 9594 ISO Date Communications Network Directory Recommendations X.500-X.521 in 1990.

According to this standard, the communication between directory client and serveur use Directory Access Protocol (DAP). But for operating being, the DAP demands the entire battery DARES, since is a protocol of the level applications.