Sockets are used in network communication when a program needs to establish a connection with another device or program on a network and exchange data. There are several scenarios where sockets are the best choice for connecting an application to a network:

  1. Real-time communication: Sockets are well-suited for real-time communication, such as online gaming, instant messaging, and video conferencing, where low latency and high throughput are required.
  2. Server-client communication: Sockets are commonly used in client-server applications, such as web servers and email servers, where a server program listens for incoming connections from client programs and exchanges data with them.
  3. Remote communication: Sockets are used to establish connections between programs running on different devices, such as between a client program running on a user's device and a server program running on a remote server.
  4. Multi-user communication: Sockets can handle multiple connections simultaneously, making them well-suited for applications that involve multiple users communicating with each other, such as chat rooms or multi-player games.
  5. Interoperability: Sockets are platform-independent and can be used to connect different types of devices and applications running on different operating systems, which makes them useful in scenarios where interoperability is required.

In summary, sockets are suitable for a wide range of applications that require real-time communication, server-client communication, remote communication, multi-user communication, and interoperability. Sockets are the most common way for applications to communicate over the network, they provide a reliable and efficient way to exchange data between devices.