Which of the following is an advantage of using disconnected data access?

Using disconnected data access primarily minimizes the impact on the database server by reducing the number of active connections it has to manage. This approach allows applications to retrieve a set of data from the database and work with it locally, which means that the application does not constantly maintain an open connection to the database server. As a result, the server can allocate its resources more efficiently, serving more clients without being overwhelmed by numerous simultaneous requests.

This method is particularly beneficial for applications that may not require real-time data or for scenarios where the data doesn't change frequently. Furthermore, it conserves bandwidth since data is retrieved at once and then used locally, rather than querying the database repeatedly while performing operations.

The other options present different contexts. For instance, increasing database connection speed typically relates more to the efficiency of the server and network rather than the disconnected approach itself. Real-time data updates are not a feature of disconnected access, as this model inherently allows for some latency since data is processed offline. Lastly, requiring a constant internet connection is contrary to the fundamental advantage of disconnected data access, which is designed to function without continuous access to the database server.