world wide web (WWW) is such example as different pages are related to each other .
We know a database is one that stores data related to each other. A network database is just like network database only difference between them is, in network database records are connected by means of a link.
Network data model is just like a normal database model. In network model the data is seen as related to each other by links. Or we can say the relation between the data is represented by links.
A network model is actually a flexible database method of representing objects and their relationships to each other. Its graph is not restricted to a specific hierarchy. Each individual record is not restricted by a finite number of parent and child groups.
Network Database model was designed to solve some of Hierarchical Database Model. Specifically this solves the problem of data redundancy by representing relationships in terms of sets.ADVANTAGESOrganization: Information is grouped into entities/records and each entity has attributes, which correspond to column headings.Very efficient in retrievalConceptually simple and easy to designCan handle the diverse sort of relationships (one-to-many and many-to-many relationships)Clear line of demarcation between programs and the complex physical storage details. Application programs work independently of the data.DISADVANTAGESAll the records have to maintain using pointers thus the database structure becomes more complex. Network model large number of pointers is required to insertion, deletion and updating.
• LDAP (Lightweight Directory Access Protocol)
what is the architecture of database network
Relational model of database is a good way to represent the database. Also network data model and hierarchical model can be used depending on the requirements.
The acronym IDMS is the initials of integrated database management system. This is a network database management system for mainframes. The model used by most is the CODASYL network model.
Network Database
1. Relational Model : Newer database model; Network Model - Older database model 2. The network model structures data as a tree of records with each record can have multiple parent and child records, forming a lattice structure. The basic data structure of the relational model is the table, where information about a particular entity (say, an employee) is represented in columns and rows 3.The relational model has strong mathematical foundation with set theory and predicate logic. Network Model has no strong mathematical background. 4. Relational model is the most flexible of the database models. Network model is not very flexible. 5. Relational model has widespead use. Network model has limited use.
network model is a collection data in which records are physically linked through linked lists .A DBMS is said to be a Network DBMS if the relationships among data in the database are of type many-to-many. The relationships among many-to-many appears in the form of a network. Thus the structure of a network database is extremely complicated because of these many-to-many relationships in which one record can be used as a key of the entire database. A network database is structured in the form of a graph that is also a data structure .
A network is defined by its database. A model network begins with a solid database. The digital routes and building software in which currents are transformed is next to consider. After planning output a programmer can began building the network and testing all input.
We know a database is one that stores data related to each other. A network database is just like network database only difference between them is, in network database records are connected by means of a link.
Network data model is just like a normal database model. In network model the data is seen as related to each other by links. Or we can say the relation between the data is represented by links.
The directory database is controlled by a Network Operating System (NOS). And examples are Windows Server 2011, UNIX, and Linux.
In network database model , the records are related to each other through a link. By a link we mean that it is an association between precisely two records.
Relational Database Model