Which of the following are examples of how client-server networks are used?

Client-server networks are a common architecture in computing environments where resources or services are centralized on servers and accessed by multiple clients. The correct answer highlights some essential functions that are typically associated with this type of network.

In the context of data storage and data backup, client-server networks play a crucial role. The server acts as a central repository for data, allowing clients (such as personal computers or devices) to store and retrieve their data efficiently. This setup enables easier management, better security, and reliable backup options because all data is centralized on a server that can be configured for redundancy, automatic backups, and recovery strategies.

The other choices, while they may involve network technology, do not align as closely with the core functions provided by client-server networks. In-house email and video conferencing primarily depend on the internet and other networking protocols rather than being strictly client-server applications. Internet browsing and social networking typically involve peer-to-peer or cloud-based architectures rather than a dedicated client-server setup. Similarly, voice calling and text messaging can be done over various networks, including mobile and VoIP technologies, but they are not specifically reliant on a client-server network configuration in the traditional sense.