PHY254H1 Lecture 18: Client-Server_Communication

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16 Jan 2018
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Computers connected to the internet talk to each other in turns, normally with one computer asking the other questions and expecting a response. This usually forms a client/server communication, where one computer is requesting data and services (the client) from another computer capable of providing them (the server). When you try to connect to a website, there is an initial set of exchanges that make that connection possible. First, your web browser sends out a request to determine where the server actually is, what its internet address is. Once it knows, it sends a request to that address for its website, or a subdirectory of that website. This request travels through the infrastructure of the. Internet until it reaches the destination written in the request. If the server is listening, then it hears the request and sends back its website in response, with the requesting computer"s address.

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