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Whenever you type an address into your web browser, or click on a link in a web page, you are making a request for a certain document. Handled by the Hyper Text Transfer Protocol (HTTP), your request is sent over the Internet to the server that holds the document you want. Assuming all goes well, the server will respond by sending the document, usually a web page consisting of text and graphics. Exactly what is HTTP? It is part of the Internet Protocol (IP) suite, and is used by a 'client,' such as a web browser, to establish a connection with the server that hosts a particular website. The server monitors TCP port 80 as it waits for incoming requests. Connections on the Internet that allow 2 computers to exchange data are created by the Transmission Control Protocol (TCP). TCP is equipped to identify the requesting computer, and to properly transmit data to its destination. Server To Web Browser -- Behind The Scenes Several TCP ports are available with standardized uses. For example, TCP Port 21 is usually reserved for FTP (File Transfer Protocol) for uploading and downloading files. Port 80 is usually used for HTTP. If the server receives a request string on TCP port 80 in the form of GET / HTTP/1.1 it will send a response code, depending on whether the requested web page is available or not. A typical request will look like this: GET /faq.html HTTP/1.1 Host: http://www.mywebsite.com This is a request for the page 'faq' on the host site 'mywebsite'. The 'host' must be specified to distinguish between websites that are hosted on shared servers. If faq.html is available, the server will respond something like: HTTP/1.1 200 OK Date: Mon, 12 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 ... followed by the actual web page. How Data Gets Where It's Going The first line above, HTTP/1.1 200 OK, means that the requested web page is available. Other codes may also be returned. For example, the code 404 means the server cannot find the requested page. When found, the web page is sent via TCP as a series of data packets, each with a header that specifies its destination and its order in the data stream. The various packets can take different paths to reach their destination. Each is sent through a router, which polls other routers close by. If a connection with the first router is unavailable, the data will be sent through another one. This allows the data to reach its destination as quickly as possible. What Happens When It Gets There When the web browser receives the data, it sends back an acknowledgement. This insures that all the packets have been received within a certain time. If not, they will be re-transmitted by the server. TCP also checks to be sure the data is undamaged. The data is then reassembled in the correct order, thanks to the sequence number of each data packet. And Presto! The web page appears on your computer screen, usually in a few seconds.
Just in time for May, The Cheap Web Hosting Report has a new look based on an open source template by Andreas Viklund. The CWHR staff thinks this is a major improvement and would like to thank Andreas for making this template available to the world. As part of this site revamp, the article library from the Frugal Webmaster Blog has finally been incorporated directly into the Cheap Web Hosting Report web site. There is no longer a jarring design switch when you read articles. The Frugal Webmaster Blog url will soon be pointing to The Cheap Web Hosting Report web site, at least in the short term. We plan to add new articles to the Library... Article Index: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
More Articles:1. Domain registration is inexpensive and protects your business In an ever-changing world it is important to have some stability. To this end you should look into registering your domain name because: * Your domain name becomes a point of association for you. Clients remember your site and services by the domain name. * Even if you change your web host the domain name would go with you and clients will be re-directed to your web site. * Since brand recall is the basis to good marketing a permanent domain name will become the 'brand' that represents your comp… 2. Does your web host affect search engine optimization? Most people will lease hosting from a company, just because they find a great deal. They don't even stop to think of the long term affects of the company's policies. Believe it or not, your web host has a dramatic involvement in your search engine rank potential. Let's say you have a website, and no matter what you do, you just cannot seem to get high search engine rankings. You have performed all of the proper SEO techniques, yet you hardly find your website in a search engine even just by typi… 3. UNIX vs. Windows- What server operating system should you use for your web hosting? So you’ve decided to create a website? The most obvious thing that you need is of course web hosting. Among other things, like cost and features, you’ll need to decide which server you’ll need: Windows (NT, 2000 or XP) or Unix (Linux, FreeBSD, OpenBSD, etc.). Both have their merits, so the first thing you should think about when making this decision is if you are looking for stability, or ease of use. UNIX based servers are generally superior in the site up-time and stability areas than Windows … 4. Handling Your Email Addresses --Company Email Addresses--Web hosting companies should provide company email accounts for each person in your company. Email addresses should appear like this:yourname@domain.comlester@definiteweb.commyname@companyname.com--Web Mails--Most websites work with web mails. Web-based email enable you to access email via a web browser such as Internet Explorer. You log into your email account via the Web to send and retrieve email. You are able to access your emails from anywhere in the world and it … |
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