What is the primary purpose of broadcasting in networking?

The primary purpose of broadcasting in networking is to transmit information to multiple network devices simultaneously. Broadcasting allows a single transmission to reach all nodes on a local network segment, making it highly efficient for scenarios where the same information needs to be sent to multiple recipients at once. This can include tasks such as addressing specific network protocols or informing devices of changes in the network.

In contrast, the other options focus on aspects that are not the primary function of broadcasting. Storing data securely refers to data storage methods or encryption practices, which are unrelated to the act of broadcasting. Increasing network speed pertains to factors that influence performance but does not specifically relate to broadcasting's purpose. Reducing network costs may be a consequence of efficient communication methods but is not the direct objective of broadcasting itself. Thus, the correct choice highlights the central role of broadcasting in transmitting information across a network.