Week10 b
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This document discusses how high-speed dial-up internet works through three main techniques: file compression, filtering and caching of web content, and using acceleration servers. File compression reduces file sizes for faster transfer speeds. Filters and caches help speed up loading of commonly accessed or repeated content. Acceleration servers break up data transfers into smaller, faster pieces to improve overall connection speeds compared to standard dial-up.
Week10 b
- 1. Introduction to How High-speed Dial-up Works While surfing the Internet, do you find yourself going to get a cup of coffee, grab a magazine or retile your bathroom between page loads? If so, chances are you're using a dial-up connection, and a sneaking suspicion may be growing on you: Is your connection actually getting slower?We'll call that the modem handshake. The second part is the software handshake. That deals with authenticating the user's access to the ISP (Internet Service Provider).
- 2. High-speed Dial-up: Acceleration Servers When you search for a Web page on the Internet, your request is routed though your ISP to the Web. After making a series of stops along the way at machines that help find the page you're looking for, your machine is connected to the computer that serves the Web page you requested. Once this connection is established, data can flow freely from the Web server to your computer.
- 3. High-speed Dial-up: File Compression The key element of high-speed dial-up Internet is file compression. If you've read How File Compression Works, then you know that there are two types of file compression: lossy and lossless. Text and other files that need to remain perfectly intact during the compression process use lossless compression. Once they are uncompressed, the files return to their original state.
- 4. High-speed Dial-up: Filtering and Caching When you type a URL (like www.AnyWebSite.com) into the address bar of your browser, you are sending a request for a specific page. If that page uses pop-up advertising, there are pop-up parameters hiding in its programming code. When the information is sent back to your machine, the hidden code executes a program that launches the advertisement.
- 5. High-speed Dial-up: The Bottom Line Now that you understand how it works, let's take a moment to look at how well it works. We decided to try out one of the more popular high-speed dial-up providers, NetZero, to see how much the service sped up a dial-up connection. After signing up for the service and choosing the "out of the box" settings, HowStuffWorks tooled around the Web with both normal and high-speed dial-up connections to test the difference In speed.
- 6. Lots More Information Related HowStuffWorks Articles ● How Telephones Work ● How Modems Work ● How WiFi Works ● WiFi Quiz ● DSL Quiz ● How DSL Works ● How Cable Modems Work ● How Web Servers Work ● How Routers Work ● How Broadband over Powerlines Works