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This content has been automatically translated from Ukrainian.
Client and server are terms used in IT to denote the roles of systems that exchange information.
What is a Client?
A client is a program or device that requests information from another device (server).
A client can be a program on a computer, mobile device, web browser, hardware, etc.
Typically, a client initiates a request to the server to obtain data or perform certain actions.
What is a Server?
A server is a computer or system that responds to clients or initiates other actions at the client's request.
A server listens for requests from clients and responds to them by providing the necessary data or initiating certain processes.
A server can serve many clients simultaneously.
Interaction between Client and Server
The client initiates a connection and sends a request to the server for information or to perform a specific action.
The server receives the request, processes it, and sends a response back to the client.
The client receives the response and can process the received data or display it to the user.
The interaction between the client and server can occur over various protocols, such as HTTP (for web applications), FTP (for file transfer), SMTP (for email), and others.
Such interactions are primarily based on the use of network protocols and standards for data transmission between the client and server.
A Simple Example of Client-Server Interaction
Client (you, the browser user)
You enter a URL in the browser's address bar and press Enter (make a request).
Server (website)
The website server receives your request for a specific page. Then the server responds (sends the page content in response).
Client (you, the browser user):
The browser receives the response from the server and displays the content of the web page on your screen (processes the received data).
In this case, the browser acts as a client interacting with the website server. When you enter a URL and press Enter, that is your request to the server. The server processes this request and sends a response, which your browser then processes and displays on the screen.
