What is Network DBMS.

 Q. What is Network DBMS: 

In Network model a parent record can have several child records and a child can also have more than one parent records. Records are physically linked through linked list. In this model, data are represented by records using links among them. It is an improvement over the hierarchical model. In this system we can have many to many relationships among records.

 The network data model is similar to hierarchical model except that an entity can have more than one parent. Integrated database management system and system 2000 are examples of NDBMS. 

Advantages of NDBMS: 

•  It is useful to represent such records which have many to many relationships.
•       In this model, the problem of inconsistency doesn’t occur because a data                     element is physically located at just one place.
•        Searching a record is easy because there are many access path to a data                       element. 

Disadvantages of NDBMS: 

•              In this model all records are maintained using pointers and hence, the whole database becomes very complex. 
•           Insertion, Updation and Deletion of any record could require pointer adjustment.