Rehber hizmet sunucuları ve uygulamaları

Abstract

With the increase in software and hardware such as Computer Networks and Internet, some new concepts like data redundancy, shared data use, and data inconsistency have gained importance.In this study, the formation of the structures that would be a solution to the problems related to these concepts is studied. In particular,in the operating system Linux (also UNIX), by managing the user accounts from a center, it was shown how to prevent the data inconsistency and unnecessary data redundancy. At the same time, it was emphasized that these information must be stored in every platform`s own user guide and that this causes many problems. In multi-programs, for instance, there is a necessity of the accessibility of information about customers by a standart database, Personel which is needed to be used collectively by many software. Because of this compulsory, for each software a database is constructed and one software cannot access the other software?s data. It is clear that this situation will lead to unnecessary repitition of data in various sources. The management of such a structure is extremely difficult. The solution to these two problems mentioned above can be supplied by using directory services. In this field, the most developed and currently being a standart directory service is LDAP(Lightweight Directory Access Protocol). From this point of view, LDAP is a good solution and software developers should provide their softwares with access to LDAP directory services by definitey supplying this supporter to their softwares. In this thesis, directory services in the scope of how the problems mentioned above can be overcome by recommended directory service structure and the methods of accessing these directory services will be studied. It is going to be studied X.500, NIS, NIS+ and in particular LADP. The advantage of LADP for these systems will be held. LADP directory services and Relational Databases will be compared