What does a distributed database refer to?

A distributed database refers to a database that is spread across different locations and managed by multiple systems. This architecture allows data to be stored on multiple servers or locations, which can improve redundancy, performance, and reliability. In a distributed database, data can be stored in separate physical locations, yet accessed and manipulated as a single coherent database by the users or applications.

This system is particularly beneficial for organizations with global operations, as it can enhance access speed and local data utilization while also providing data replication for backup and disaster recovery purposes. The management of such a database often requires sophisticated systems to ensure data consistency and integrity across all distributed locations.

The other choices do not accurately describe a distributed database: a database stored in one physical location refers to a centralized database, accessibility via mobile devices pertains to access methods rather than database architecture, and lack of internet connectivity does not define a distributed database, which can function effectively over networks.