Exploring the Internet 91.113-031 Instructor: Patrick Krolak Topic: What is the Internet Internet Growth How does the Internet works Basic Concepts P. D. Krolak & M. S. Krolak ©2005 The Internet
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Instructor: Patrick Krolak
Topic: What is the Internet
How does the Internet works
P. D. Krolak & M. S. Krolak ©2005
Some basic information about the Internet, about how it works, and how it is creating changes in our private life, society, business and government.
“The Federal Networking Council (FNC) agrees that the following language reflects our definition of the term "Internet".
"Internet" refers to the global information system that -- (i) is logically linked together by a globally unique address space based on the Internet Protocol (IP) or its subsequent extensions/follow-ons;(ii) is able to support communications using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite or its subsequent extensions/follow-ons, and/or other IP-compatible protocols; and (iii) provides, uses or makes accessible, either publicly or privately, high level services layered on the communications and related infrastructure described herein."
Some basic ideas to help understand the technology and the jargon.
An agreed-upon format for transmitting data between two devices. The protocol determines the following:
TCP/IP is the means by which the Internet transmits information from one computer to the other.
IP is a series of protocols for creating information packets called datagrams. Think of a packet like a letter. Each packet has a wrapper with a destination address and data inside.
The Web has the following elements:
The web uses a client/server model:
Short for Web browser, a software application used to locate and display Web pages. The two most popular browsers are Netscape Navigator and Microsoft Internet Explorer. Both of these are graphical browsers, which means that they can display graphics as well as text. In addition, most modern browsers can present multimedia information, including sound and video, though they require plug-ins for some formats
A special type of database system, invented by Ted Nelson in the 1960s, in which objects (text, pictures, music, programs, and so on) can be creatively linked to each other. When you select an object, you can see all the other objects that are linked to it. You can move from one object to another even though they might have very different forms.
For example, while reading a document about Mozart,
The URL is divided into three parts:
The Domain Name or IP address
Thus a URL defines a service (protocol) to be preformed, the location on the Internet of the Server and the path to the file on Server associated with the service.
The path describes where to find the information in the computer:
Source: Webster's New Millennium™ Dictionary of English, Preview Edition (v 0.9.6)
Copyright © 2003-2005 Lexico Publishing Group, LLC
The blogosphere may be a baby, but it is booming, Web trackers say. Although the concept of "blogging" didn't exist a decade ago, today the number of blogs doubles every five months. And a new blog is created almost every second — that's more than 80,000 every day, according to the blog tracking group Technorati. "The tools to create blogs have become markedly easier and more accessible," Technorati Founder and CEO David L. Sifry told CBSNews.com. "If the numbers continue going the way that they are, you should expect to see close to 30 million blogs by March of next year and should be seeing 2 million posts a day."