JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV DISTRIBUTED DATABASES Previous Question Paper (January/February - 2023 - R18)

A Distributed Database Management System (DDBMS) is a software system that manages a distributed database while making the distribution transparent to the user. It enables the management of data stored across multiple physically dispersed sites connected by a computer network, ensuring that the collection of data appears as a single, logically integrated database to the end-user or application.

Network transparency, also known as distribution transparency, is a property of a distributed database system that allows users and applications to operate on data without needing to know the physical location of the data or the network topology of the system. It ensures that the distributed nature of the database is hidden from the end-user.

Key aspects include:

• Location transparency: Users can access data using a logical name without specifying the node or site where the data resides.
• Naming transparency: A unique global name is provided for all data objects, ensuring that the same name refers to the same object regardless of the user's location.
• Communication transparency: The system automatically handles the complexities of network protocols and data transmission between sites, making the network infrastructure invisible to the user.