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Lesson 2 The Internet and the World Wide Web Computer Concepts BASICS 4th Edition 1 Wells Objectives Lesson 2 2 Explain the origin of the Internet and describe how the Internet works Explain the difference between the World Wide Web and the Internet Describe the major features of the Internet Explain how to connect to the Internet Wells Computer Concepts BASICS Objectives (continued) Lesson 2 3 Describe a browser Identify browser features Apply and use browser features Describe other Internet features Wells Computer Concepts BASICS Vocabulary Lesson 2 4 Address bar browser domain name home page host computer host node Wells hyperlink Hypertext Markup Language (HTML) Hypertext Transfer Protocol (HTTP) Internet service provider (ISP) Computer Concepts BASICS Vocabulary (continued) Lesson 2 5 online service provider (OSP) protocol Transmission Control Protocol and Internet Protocol (TCP/IP) Wells Uniform Resource Locator (URL) Web 2.0 Web page World Wide Web Computer Concepts BASICS Evolution of the Internet Internet origins trace back to 1960’s – Lesson 2 Over next 30 years e-mail was added and 100,000 computers linked to ARPANET World Wide Web came into being in 1992 Mosaic browser introduced in 1993 Internet’s Impact on Society – 6 United States Department of Defense (ARPANET) Wells In 2007, 70% of all Americans use the Internet Computer Concepts BASICS Internet Basics Lesson 2 7 The Internet links together networks and computers across the world Interoperability is the ability for all makes and models of computers to communicate TCP/IP or Transmission Control Protocol and Internet Protocol is a standard format for transmitting data on the Internet Domain name identifies a site on the Internet Wells Computer Concepts BASICS Internet Basics (continued) Lesson 2 8 The World Wide Web: The World Wide Web is a subset or an application that makes use of the Internet The Web began in 1990 with the introduction of Hypertext Transfer Protocol (HTTP) which allow computers to communicate with hypertext documents Hypertext Markup Language (HTML) is the format of Web pages Wells Computer Concepts BASICS Internet Basics (continued) Lesson 2 9 The World Wide Web (continued): In 1993, the number of people using the Internet increased with the introduction of Mosaic, the first graphical browser Wells Computer Concepts BASICS Internet Basics (continued) The World Wide Web (continued): In 2004, the phrase Web 2.0 was coined – Lesson 2 – 10 – Wells where users can modify content participatory Web blogs, wiki’s, social-networking sites Computer Concepts BASICS Internet Basics (continued) Lesson 2 11 Web Protocols-HTTP: Web Protocols - HTTP defines how pages are transmitted Web page address is often referred to as the URL or Uniform Resource Locator – First part of address indicates protocol to use – Second part identifies the domain name – For example, http://smithsonianmag.com Wells Computer Concepts BASICS Internet Basics (continued) Lesson 2 12 Web Protocols-HTML: Web Protocols - HTML determines how Web pages are formatted and displayed to users Hypertext is a text-based link to other documents and is often called a link or hyperlink A Web page is a text page coded with HTML markup tags Wells Computer Concepts BASICS Accessing the Internet Lesson 2 13 To connect to the Internet you have to be connected and become part of a network A local area network (LAN) connects computers within a limited geographical area You connect using a network interface card (NIC) that is inside your computer Wells Computer Concepts BASICS Accessing the Internet (continued) Getting Connected: Step 1: You locate – Lesson 2 – – 14 an Internet service provider (ISP) an Online service provider (OSP) or a Wireless Internet service provider (WISP) Step 2: Install the software provided by your ISP, OSP, or WISP Step 3: Install a browser Wells Computer Concepts BASICS Browser Basics Browser is a software program that you use to retrieve documents from the Web Internet Explorer 7 Lesson 2 – – – – 15 Wells Tabbed browsing is a new feature When you start IE7, your first tab will be your home page To launch IE7 double-click on the icon or start the browser through the Start menu The Web site address goes in the Address bar Computer Concepts BASICS Browser Basics (continued) Menu bar (left side of IE window) – Command bar (right side, below menu bar) Lesson 2 – Keeps track of Web addresses, forms, passwords Address list – 16 Options such as: Home, Feeds, Tools, Research AutoComplete – Options such as: File, Edit, Tools, Favorites, Help Wells Displays previously visited Web pages Computer Concepts BASICS Browser Basics (continued) Internet Explorer browser window Lesson 2 17 Wells Computer Concepts BASICS Browser Basics (continued) Lesson 2 18 Your home page is the first pages that is displayed when you start your browser AutoSearch makes it easy to search by typing in common term in the address bar The History button allows you to see a list of sites you visited in the past (20 days default) Favorites allows you to designate a page as one you want to visit again Wells Computer Concepts BASICS Browser Basics (continued) Lesson 2 19 The Content Advisor provides control over content that can be viewed When you explore the Web your browser keeps a record of sites visited in the disk cache. You can copy and paste information from Web pages or save the page Wells Computer Concepts BASICS Browser Basics (continued) Saving a Web page Lesson 2 20 Wells Computer Concepts BASICS Browser Basics (continued) To download means to transfer from a Web server or another computer to your computer Lesson 2 21 Wells Computer Concepts BASICS Other Internet Features Lesson 2 22 A blog (short for Web log) is a Web page that serves as a publicly accessible journal A chat room is when you can communicate real-time with another user or group of users E-mail is electronic mail, and is one of the most popular services FTP (file transfer protocol) is an Internet standard that allows you to download and upload files Wells Computer Concepts BASICS Other Internet Features (continued) Lesson 2 23 Instant messaging allows you to communicate real-time with online friends A mailing list is a group of people with a shared interest A newsgroup is a discussion forum or type of bulletin board dedicated to a topic Online conferencing allows virtual meetings VoIP (Voice over IP) uses an Internet connection instead of a telephone line Wells Computer Concepts BASICS Lesson 2 Summary 24 In this lesson, you learned: No one person or organization can claim credit for creating the Internet. Origins of the Internet can be traced to the United States Department of Defense. The original name for the Internet was ARPANET. Mosaic was the Internet’s first graphical interface. To connect to the Internet from a business, school, or other organization, you probably have a direct connection via a local area network and a network interface card. Wells Computer Concepts BASICS Summary (continued) Lesson 2 25 Types of Internet connections include modem and telephone line, DSL, cable modem, wireless, and fiber optics. To connect to the Internet, you need an Internet connection, telecommunications software, and a browser for the Web. Interoperability means that all brands, models, and makes of computers can communicate with each other. A protocol is a standard format for transferring data between two devices. TCP/IP is the agreed upon international standard for transmitting data. Wells Computer Concepts BASICS Summary (continued) Lesson 2 26 The domain name identifies a site on the Internet. The Internet is made up of many services. The Web is an application that makes use of the Internet. Web pages can be linked through hyperlinks. Microsoft Internet Explorer is a popular Web browser. The HTTP protocol defines how Web messages are formatted and transmitted. Wells Computer Concepts BASICS Summary (continued) Lesson 2 27 A Web site address is referred to as the URL, or Universal Resource Locator. Every Web page on the Internet has its own unique address. HTML is a coding language that controls how Web pages are formatted and displayed. A Web page is coded with HTML markup tags. Other Internet services include blogs, chat rooms, email, File Transfer Protocol, instant messaging, mailing lists, newsgroups and bulletin boards, online conferencing, and Voice over Internet Protocol. Wells Computer Concepts BASICS