Slide 1The InternetHistory of the InternetSlide 4Slide 5How can you connect to the Internet?How can you connect to the Internet?How the Internet WorksSlide 9What Is the World Wide Web?Internet Software: The Client-server PartnershipThe World Wide WebInternet AddressesSlide 14Slide 15Slide 16Slide 17Keeping the Web Straight: Document AddressesHow to Check your IP addressHypertext LinksWhat Is a Web Site?What Is a Home Page?Who Provides Internet Information?Using the World Wide WebWhat Affects the Speed of Transmission?Error Messages Do HappenIE Menu BarIE Toolbar = Quick NavigationAssignment 1A Brief Word on SearchingTry SearchingSlide 32Slide 33Slide 34Slide 35Example:Slide 37Slide 38Slide 39Slide 40Slide 41Slide 42Slide 43Slide 44Slide 45Slide 46Slide 47Slide 48Slide 49Slide 50Slide 51Electronic CommerceOther Internet ServicesSlide 54Slide 55Slide 56Slide 57NetiquetteWeb PublishingSummary of the Internet and World Wide WebChapter 2The Internet and World Wide WebThe InternetWhat are some services found on the Internet?p. 2.02 Fig. 2-14. Chat(4)(1)1. E-mail(2)2. Web(3)3. File transfer(5)5. Message board(6)6. Instant messaging (AIM, MSN, Yahoo, ICQ)History of the InternetHow did the Internet originate?p. 2.02 ARPANET: Networking project by Pentagon’s Advanced Research Projects Agency (ARPA)---To allow scientists at different locations to share information---can function even if part of network were destroyed by a disaster  ARPANET became functional in September 1969. Four main computers: UCLA, UCSB,Stanford,UUHistory of the InternetHow has the Internet grown?p. 2.03TodayMore than 150 million host nodes1984More than 1,000 host nodes1969Four host nodesHistory of the InternetWho controls the Internet?p. 2.04World Wide Web Consortium (W3C)Oversees research, sets standards and guidelinesInternet2 (I2)Internet-related research and development projectDevelops and tests advanced Internet technologiesNo onec—cit is a public, cooperative, andindependent networkSeveral organizations set standardsHow can you connect to the Internet?1. Dial-up accessmodem in your computer uses a standard telephone line to connect to the Internet.2. Integrated Services Digital Network (ISDN) replaced by3. Digital subscriber line (DSL) provide connections using regular copper telephone lines.4. Cable Modem taking advantage of unused bandwidth on a cable television network.How can you connect to the Internet?Dial-up DSL Cable TVSpeed56 Kbps 128 Kbps to 1.544 Mbps200Kbps~1.5Mbps or morePrice$6~$20/month$20~$50/month$20~$50/monthConnectionEstablish connection each time you log onalways on—whenever the computer is runningEvaluation Slow but inexpensiveHigh speed but cost about twiceas much as dial-up http://www.ispcomparison.net/How the Internet WorksWhat are the ways to access the Internet?p. 2.06 Fig. 2-21. Internet Service Provider (ISP) Regional ISP: National ISP : AT&T and EarthLink provide: internet access (dial-up,DSL, cable)2. Online Service Provider (OSP) like AOL and MSN provide: internet access and many members-only features 3. Wireless Internet Service Provider (WISP) like AT&T wireless and Vorizon wireless provide: internet accessHow the Internet WorksHow might data travel the Internet using atelephone line connection?p. 2.07 Fig. 2-3Step 1. Request data from a server on InternetStep 5. Regional ISP uses leased lines to send data to a national ISPStep 6. National ISP routes data across the countryStep 8. Server sends data back to youStep 2. Modem converts digital signals to analog signalsStep 3. Data travels through telephone lines to a local ISPStep 4. Data passes through routersStep 7. National ISP passes data to local ISPWhat Is the World Wide Web?The internet is a network of computer networks worldwideThe web is a tool used to retrieve information published on the internetTo navigate the web we use a browser such as Netscape or internet explorer(IE)Internet Software: The Client-server Partnership Two pieces of software that work togetherClient: software application on user’s computerClient retrieves, displays information for userServer: stores and sends information to clients as requestedThe World Wide WebWhat is a Web browser?p. 2.09MicrosoftInternetExplorerNetscapeMozillaProgram that allows you to view Web pages FirefoxInternet AddressesWhat is a URL (Uniform Resource Locator)?p. 2.10 Fig. 2-8Unique address for a Web pageA web server delivers the Web page to your computerThe World Wide WebWhat is downloading?p. 2.10The process of a computer receiving informationDepending upon connection speed, downloading can take from a few seconds to several minutesThe World Wide WebHow can you establish a connection and start theWeb browser?p. 2.09 Fig. 2-6Step 2.If necessary, connect to the InternetStep 3.Connection to the Internet occurs, and a home page displaysStep 1.Click the Web browser program nameThe World Wide WebHow do handheld computers and cellular telephones access the Web?p. 2.10 Fig. 2-7Must be Web-enabledUse a microbrowser that displays Web pages that contain mostly textHow the Internet WorksWhat is a domain name?p. 2.08 Figs. 2-4 – 2-5Text version of Internet protocol (IP) addressNumber that uniquely identifies each computer or device connected to InternetDomain name:www.google.comIP: 64.233.161.99Keeping the Web Straight: Document AddressesAddress format: Eg., Http://www.cs.gsu.edu/~xfu1/1010.htmlAddress must be exact, i.e. Upper and lower case letters make a difference.Edu, .Com, .Org, .Gov, ~HTTP: hypertext transfer protocol Document type for all web documentsHTML: hypertext markup language Language for creating web documentsHow to Check your IP addressp. 2.08 Figs. 2-4 – 2-5Check your own IP address•Start ---all programs ---Accessories—Command Prompt•Type “ ipconfig /all”. Check what is the IP address• Start ---all programs ---Accessories—Command Prompt• Type “ping www.google.com”Hypertext LinksHighlighted words or text in a WWW documentMoves you to a place within same document, or to a web page elsewherePrevious pagewww.student.gsu.edu/~xfu1/1010.htmlWhat Is a Web Site?http://www.library.utoronto.caan electronic document stored on a web serveruses HTML (Hypertext Markup Language)may include text, sound, animation, imagesusually has links to other Web pages or different parts of the same Web siteWhat Is a Home Page?The first web page you see when you access a web siteUsually