![]() Depending on their purpose, they may have very powerful processors, or huge amounts of memory or disk space. Servers don’t have screens, keyboards, or mice the only way to interact with them is over a network. Server hardware is a specialized type of computer, designed specifically for responding to requests coming in over a network. The term “server” can refer to either hardware or software. That server is also talking to the app installed on your friend’s phone, and relaying messages back and forth between you. When you use a messaging app on your phone to message a friend, the app is a client, talking to a server operated by the app’s developer. On the other hand, it’s common for several small, low-traffic websites to all be hosted on a single physical server. ![]() ![]() Very busy websites like Google Search are hosted on thousands of servers, all around the world, working together. The server sends back that page’s content for your browser to display. The browser sends a request to the server over the Internet, asking it for the webpage whose URL is in the address bar. When you access a website, your browser is acting as a client, and a computer somewhere else in the world is acting as the server. The term “client” may refer to a person using the service, or a piece of software (like a Web browser) or hardware (like a phone or computer) the person is using to access the service. The consumers of the service are called clients. Servers can be physical machines, virtual machines, or software that performs server-like functions. A server is a piece of software or hardware whose purpose is to offer a service over a computer network, such as the Internet.
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