What is Client and server?

A client is a program or device that requests information or services from a server. A server, on the other hand, is a program or device that provides information or services to clients. Clients and servers communicate with each other over a network using a protocol such as HTTP or FTP. The client-server model is a fundamental concept in computer networking and is widely used in many applications such as web browsing, email, file transfer, and online gaming.