Active Directory Basics – Part 1

Active Directory Basics


We have to understand the directory structure to get a clear understanding of the Active Directory. Many of us are reluctant to learn AD because it’s just like a pacific ocean to swim. But when you start analyzing the building blocks of AD , you will feel relaxed and then start thinking about Active directory and its implementation.



Every organization today uses Active directory as centralized repository , all that they use AD to store their data. In a very simplest forms you need to understand ( Just remember DOS J )


Directory :  Place where all the data gets stored


Objects :    Application uses objects to store data into the directory


Schema :   In order to use Object , the object should be defined in the schema without

                  Which you cannot use the object to store data to directory


Data Flow


Application à Object à Schema à Directory




This directory is viewed as


a)       Logical Structure : Exposed to users as Forests and Domains

b)       Physical Structure : Implemented as database residing on each and every Domain



Communication to the database is not straight forward, we need to have some means to write data to the directory , so Microsoft used Active directory data store as an interface to write data to the directory. This AD Data store is made up on services and files which decide how to handle I/O operation on to the database.



Data Flow



Application à Object à AD Data Store à Database


                                          Files and Services


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