Week10 B SLIDE
- 1. Introduction Is your connection actually getting slower? If so, chances are you're using a dial-up connection . Services like NetZero and EarthLink are now offering "high-speed dial-up." According to ads for these services, you can get connection speeds that are five times faster than traditional dial-up service.
- 2. Software Handshake High-speed dial-up providers have cut down on this back-and-forth by creating a system that allows the conversing machines to remember responses to questions. The increase in speed varies by machine, but in some cases it can reduce the handshake by up to 50 percent.
- 3. acceleration server By loading special software into a server, high-speed dial-up providers turn it into what they call an acceleration server. When you search for a Web page using high-speed dial-up, your request is sent from the dial-up modem in your computer to the ISP's acceleration server. Now the acceleration server is requesting and serving pages on your behalf.
- 4. File Compression The key element of high-speed dial- up Internet is file compression. Typically, text will compress at least 50 percent using on-the-fly techniques. Typically, the image file size shrinks anywhere from 50 percent to 90 percent in the process.
- 5. Filtering When the information is sent back to your machine, the hidden code executes a program that launches the advertisement. To combat this drag, high-speed dial-up providers have bundled a pop-up blocker into the software they send to subscribers. What this amounts to is less information being sent across the phone line to your machine.
- 6. Caching Internet browsers like Explorer or Netscape are made to cache frequently viewed pages to cut down on load times. High-speed dial-up software enhances this feature. The most amazing thing about this tool is that with the combination of server-side caching and client-side caching, the system learns about your surfing habits. It uses what it learns to streamline your connection process as much as possible.