웹 서버
Each Web server runs HTTP server software, which responds to requests from web browsers. Generally, the HTTP server has a directory (folder), which is designated as a document collection – files that can be sent to Web browsers connected to this server. For example, if the Web server has the domain name codice_1, and its document collection is stored at codice_2 in the local file system, then the Web server will respond to a request for codice_3 by sending to the browser the (pre-written) file codice_4.