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Ch 4: Internet, Intranet, and Extranet

About This Chapter

Watch information systems and computer applications video lessons that will define the terms internet, intranet and extranet. The lessons will explain the differences, similarities and features of these concepts.

Internet, Intranet, and Extranet

You likely use the internet on a regular basis. Most people have internet connections at their homes, at work and on-the-go through devices like cell phones. But just because you use it doesn't necessarily mean you understand how it works. Our lessons will help you by explaining things like IP addresses, Internet service providers and URLs.

Also see how the World Wide Web works and learn about its link to the internet. As you study the World Wide Web, the lessons will also go into Web page design and programming languages. Become familiar with terms you've likely heard before, such as HTML, CSS, XML and JavaScript.

In studying the internet and the World Wide Web, the lessons will touch on standards for network communications around the world. You'll get to learn more about the different protocols used. Discover the meaning behind terms like ISO, ANSI and W3C.

No discussion of the internet and World Wide Web would be complete without taking a glimpse at online communication. Find out more about internet services and the different platforms available for personal and business communications. Some of the things covered in this lesson include instant messaging, blogging, Twitter, RSS feeds and newsgroups. Also study group communication methods, such as video conferencing, VOIP and TelePresence.

Expand on your knowledge of the World Wide Web through a lesson on how to conduct an online search. Find out more about search engines and how to use them properly. Discover the importance of choosing the right keywords in a search. Find out what spiders are and what Web crawling is.

Let our lessons introduce you to the ideas of intranets and extranets. Find out what both are and how they work. Figure out the ways they help to communicate information and data.

Wrap up these lessons with a discussion of e-commerce and m-commerce. Find out how doing business online and through mobile devices have changed how companies operate. Discover the impact of these forms of business on the consumer, too. Thanks for watching our lessons!

10 Lessons in Chapter 4: Internet, Intranet, and Extranet
The Internet: IP Addresses, URLs, ISPs, DNS & ARPANET

1. The Internet: IP Addresses, URLs, ISPs, DNS & ARPANET

We'll cover the basics of the Internet, including its history and functioning. Key topics include IP addresses, TCP/IP communication protocol, DNS, URLs, and the transfer of information as packets through the Internet.

World Wide Web: How the Web Works

2. World Wide Web: How the Web Works

In this lesson, an overview of the World Wide Web is discussed, including its development and operation. The various technologies that enable the Web to work are also described. Topics include Web browsers, hypertext markup language, hypertext transfer protocol, hyperlink and FTP.

Web Page Design and Programming Languages: HTML, XHTML, XML, CSS & JavaScript

3. Web Page Design and Programming Languages: HTML, XHTML, XML, CSS & JavaScript

Web design is the creation and visual design of documents displayed on the World Wide Web. It is important to create engaging and visually appealing websites to attract and retain customers. Many factors must be considered when designing a website. This video will explore the steps in Web design and the programming languages needed to create a dynamic and interactive website.

Internet Communication: Twitter, Email, IM, Blogging, RSS & Newsgroups

4. Internet Communication: Twitter, Email, IM, Blogging, RSS & Newsgroups

Social media adds business value by building networks that enhance competitive advantage, enable the exchange of information and foster strong relationships. There are various Internet communication tools that enable us to network both personally and professionally such as Facebook, e-mails, chat and RSS.

Internet Collaboration: Second Life, VOIP, Video Conferencing, Virtual Reality & Telepresence

5. Internet Collaboration: Second Life, VOIP, Video Conferencing, Virtual Reality & Telepresence

Today, individuals and businesses are collaborating and interacting online from dispersed locations. Many technologies make it possible to communicate, learn, conduct business, and socialize with people from anywhere in the world. This lesson will discuss various Internet collaboration tools and virtual reality concepts.

Search Engines, Keywords & Web Portals

6. Search Engines, Keywords & Web Portals

Search engines enable users to locate a vast amount of information on any topic quickly and conveniently through the Internet. Common search engines include Google, Yahoo, Bing, and AOL. The topics discussed in this lesson include search engines, Web portals, keywords, Boolean operators, spiders, search forms, database, and meta tags.

Intranet and Extranet: Comparing Information and Data Dissemination

7. Intranet and Extranet: Comparing Information and Data Dissemination

Organizations rely upon intranets and extranets to share information, communicate with employees, suppliers and customers, and enable collaboration on projects. This lesson explains how intranets and extranets work. It introduces the topics of virtual private networks, tunneling and firewalls.

OSI Model: Using Open Systems Interconnection to Send and Receive Data

8. OSI Model: Using Open Systems Interconnection to Send and Receive Data

The Open System Interconnection (OSI) model describes how data is sent and received over a network. It consists of seven layers: the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer. This lesson discusses how the OSI model works and the role of each layer for transmitting messages.

Internet Connectivity and Communication Standards

9. Internet Connectivity and Communication Standards

Standards and protocols provide the essential rules that enable hardware and software to work together and allow devices to communicate over a computer network. This lesson will explore formal and de facto standards, protocols such as TCP/IP, and industry officials including IEEE, ISO, ACM, IETF, ITU-T, and CODASYL.

e-commerce & m-commerce: Buying & Selling on the Web & Mobile Devices

10. e-commerce & m-commerce: Buying & Selling on the Web & Mobile Devices

E-commerce and m-commerce have transformed the way that organizations and consumers conduct business. Additional topics discussed in this lesson include B2B, B2C, C2C, and e-government.

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