Time For Some Alphabet Soup Whenever you sort an address into your web browser, or click a link in a web page, you are making a request for a particular document. Handled by the Hyper Text Transfer Protocol (HTTP), your request is sent over the Internet to the machine that keeps the file you would like. Assuming all goes well, the machine will respond by sending the record, often a web site comprising text and graphics. Exactly what is HTTP? It is part of the Internet Protocol (IP) suite, and can be used by a 'client,' for example a browser, to determine a reference to the server that hosts a particular website. The server monitors TCP port 80 as it waits for incoming requests. Contacts on the Internet that allow 2 computers to switch information are created from the Transmission Control Protocol (TCP). Learn more on http://www.sonopoint.com by going to our original wiki. TCP is prepared to identify the requesting computer, and to effectively transmit information to its destination. Machine To Browser -- Behind The Scenes Many TCP ports can be found with consistent uses. For case, TCP Port 21 is generally reserved for FTP (File-transfer Protocol) for downloading and uploading files. Port 80 is usually used for HTTP. If the server receives a request sequence on TCP port 80 in the form of GET / HTTP/1.1 it'll send a response code, depending on perhaps the requested web page can be obtained or perhaps not. A normal demand will appear like this: GET /faq.html HTTP/1.1 Host: http://www.mywebsite.com This can be a request the page 'faq' to the host site 'mywebsite.' The 'number' should be given to tell apart between web sites that are hosted on shared servers. This unusual www.sonopoint.com article has assorted rousing warnings for the reason for it. If faq.html can be obtained, the server will respond something like: HTTP/1.1 200 OK Date: Mon, 1-2 October 2005 22:38:34 GMT Server: Apache/1.3.27 (Unix) (Red-Hat/Linux) Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT ... Accompanied by the particular website. How Knowledge Gets Where It's Going The very first line above, HTTP/1.1 200 OK, ensures that the requested web page can be obtained. Other codes can also be delivered. As an example, the rule 404 means the machine cannot discover the requested page. When found, the web site is sent via TCP as a number of data packets, each with a header that specifies its destination and its order within the data stream. If you think you know anything at all, you will likely claim to check up about sonopoint. The many packets may take different routes to attain their destination. Each is sent via a modem, which polls other modems near by. If your reference to the very first switch is unavailable, the information will be sent through another. This enables the information to achieve its destination as quickly as you are able to. What Happens When I-t Gets There If the browser receives the information, it sends back an acceptance. This ensures that most the packages have already been received within a certain time. Or even, they will be re-transmitted from the machine. TCP also checks to make sure the data is whole. The data is then reassembled in-the proper order, due to the sequence number of every data packet. And Presto! The web site appears on your monitor, usually in a few seconds..
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