随笔分类 - 互联网工作原理
互联网工作原理
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摘要：Video signals are received by the telephone company's national head end, which pulls in video feeds from satellites.
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摘要：To receive Internet-enhanced TV, a television set requires a special set-top box that can receive and deliver the Internet-enhanced services. The set-top box has a powerful processor and a hard dis...
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摘要：The coaxial cablesometimes called a broadband wirethat comes into a home from a pole is divided into two connections by a splitter inside the home. One part of the wire goes to the normal set-top b...
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摘要：One of the major benefits of DSL is that it doesn't need any special wires. It is delivered over existing copper phone lineswhat is often referred to as POTS, or the plain old telephone system. DSL...
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摘要：Modems are controlled by software on your PC using a language called the Hayes command set or AT command set. When a modem is to be dialed, the first command given it is to tell it to go off hookin...
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摘要：Dumb terminal A terminal connected to a mainframe, minicomputer, or other kind of large computer. This type of connection often can be found in libraries or universities, although those institution...
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摘要：Online services such as America Online provide a very convenient way to use Internet resources. These services have their own software that makes accessing Internet resources such as Telnet and FTP...
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摘要：Routers are the traffic cops of the Internet. They ensure that all data gets sent to where it's supposed to go via the most efficient route. When you sit down at your computer and connect to the In...
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摘要：Before an RSS feed can be created, content that is going to be the subject of the feed needs to be put on a web page. Blogs are frequently fed via RSS, but any information put in the Web (such as n...
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摘要：[插图太大请下载后观看] 互联网成为我们这个时代的普遍文化和政治有多重要？ 有很多人认为， 2004年在克里和布什之间的总统大选很大程度上是由当时新兴的网络技术---博客决定的。 候选人克里是无数博客进行良好协同攻击的主题，有些人认为，这对增加布什的支持度已经足够了。 博客不再是被选举推动发展的新兴事物, 它已经变成了强大的文化武器. 那么,到底什么是博客? 从某种程度上说, ...
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摘要：Computers and devices on the Internet need to have a unique IP address to perform simple tasks such as browsing the Web. But the Internet has grown so substantially since it was invented, that ther...
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摘要：[插图太大请下载后观看] When you connect to the Internet, your computer must be identified by a number called an IP address. There are two different methods for assigning IP addresses, statically or dynamical...
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摘要：When a particular uniform resource locator (URL) needs to be contacted, the address with the URL must be matched to the true IP address. Your web browser first goes to a local name server maintaine...
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摘要：[插图太大请下载后观看] The Internet Protocol (IP) delivers mail based on the specific email address. The domain of the address is expressed as four numbers, separated by periods (called dots), such as 163.52...
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摘要：[插图太大请下载后观看] The PC-based browser software controls the client end of the Web application. Using TCP/IP, the browser issues HTTP requests to the host server. The browser can request a specific web ...
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