Answer:
client
server
Explanation:
The browser is the client, and the system that sends you the web page is known as the server. And these together form the client-server architecture. A perfect example of a client-server model is, however, a video game that has an app for the client, and a server. And as an example, such set up is established using the socket programming or the SignalR in dot net. Various other technology does support socket programming. And you can find it in fact on all the platforms.
