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