互联网工作原理(6. 客户端/服务器架构是如何工作的)
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The PC-based browser software controls the client end of the Web application. Using TCP/IP, the browser issues HTTP requests to the host server. The browser can request a specific web page, or it can ask the host server to perform a database query. In either instance, the request is broken into HTTP packets that are sent across the Internet's TCP/IP communications infrastructure to the host computer.