World Wide Web Communication The World Wide Web is about communication between web clients and web servers . Clients are often browsers (Chrome, Edge, Safari), but they can be any type of program or device. Servers are most often computers in the cloud. HTTP Request / Response Communication between clients and servers is done by requests and responses : A client (a browser) sends an HTTP request to the web A web server receives the request The server runs an application to process the request The server returns an HTTP response (output) to the browser The client (the browser) receives the response