11INTERNET ANDeBUSINESS (I)BUS3500 - Abdou Illia, Fall 2012(October 29, 2012)2LEARNING GOALS Identify and describe the major Internet applications. Define the World Wide Web and its operation. Distinguish between Internet, intranet, extranet, and explain how companies use them.3Test your Internet knowledge (1)During a previous class meeting, we saw that a network can be set up in order to share software resources (like data files, databases, and programs) and hardware resources (like printers). In other words, we can say that a network can be set up to provide file service, database service, and print service to users. Based on your Internet experience what kind of services users can get from the Internet? . . . . . .24Brief history of the Internet1969 The Defense Advanced Research Projects developed ARPANET, the precursor of the Internet1971 Ray Tomlison invents e-mail1979 USENET newsgroups created at Duke University and the University of North Carolina1984 Domain Name System (DNS) established1991 Tim Berners-Lee creates the World Wide Web1994 First online shopping mall, first spam email, first pizza ordered online, first advertisement banner2000 A major denial of service attack brings down websites such as Yahoo!, Amazon.com, and eBay2002 Denial of service attack knocks out 8/15 root DNS servers5Test your Internet knowledge (2)Based on your Internet experience what are the different types Internet connections a residential user or a business can subscribe for? . . . . . .6Accessing the Internet37Test your Internet knowledge (3)Based on your Internet experience which of the following content can you download from the Internet?a) Text filesb) Audio filesc) Video filesd) Graphic files8File formats offered over the WWW9Webserver needs:- Network (or Server) Operating System-TCP/IP- Domain name (e.g. eiu.edu)- Internet access - IP Address (e.g. 139.67.8.3)User PC needs:- Workstation Operating System-TCP/IP- Web browser (e.g. Internet Explorer)- Internet access (e.g. thru an ISP)- IP Address (e.g. 128.150.50.9)Accessing the Internet (www)NetworkWeb BrowserPacketRouterPacketRouteWebserverSoftware410Internet applications/services E-Mail File transfers Instant messaging (IM) Newsgroups Streaming audio and video Internet telephony World Wide Web (WWW)11E-Mail Most popular and widely used Internet application More than 30 billion e-mails sent every day Spam – junk e-mail messages Spam costs corporate America $9 billion per year Every e-mail message contains head that describes source and destination for the message E-mail messages are text, but may have attachments of many types of digital data Viruses often transmitted via e-mail 12File Transfer File transfer protocol (FTP) Protocol providing for transmission of a file between an Internet server and a user’s computer Peer-to-peer (P2P) file sharing Share data from one computer to another Every user can be a server and a client With P2P, every user on the network can make data available to every other user on the network Examples of P2P File transfer systems: Napster Kazaa Gnutella Limewire513P2P service with facilitating server Files to be shared are on client PCs Clients upload the list of available file (NOT the actual files)Client PCNapsterIndexServer1.Uploads ListOf AvailableFilesWhen ConnectsClient PC Client PC2.Search Query3.Response4.Large P2PDownloadFile ListList ofAvailable FilesFrom AllCurrent Clients14Instant Messaging Allows user to create a private chat session with another user IM started with AOL Many Web-based companies use IM technology for customer service State of Virginia eBay15Usenet Newsgroups Online, bulletin board discussion forums Users post and read messages More than 100,000 newsgroups Millions of newsgroup readers Important information resource, especially for technical issues and products616Streaming Audio and Video Creating and sending audio and video files Sports Men’s intercollegiate basketball at sports.yahoo.com Major league baseball News Fox News CNN radio Business ZDNet Education Warriors of the Net General Youtube.com Also known as Podcasting17Internet Telephony Uses Voice-over Internet Protocol (VoIP) Can use your computer to make phone calls Software connects computers via the Internet and transmits voice data Savings comes from eliminating toll charges between locationsClient PCIn Zone 1Client PCin Zone 2GatekeeperFor Zone 21.H.323Connection1.H.323Connection1.H.323 Connection2.Subsequent H.323 P2P communication(or continue communicating through gateways)GatekeepersAuthenticate,LocatePSTNOrdinary TelephoneGatewayGatekeeperFor Zone 13. PSTN Connection18Intranets and Extranets Intranet Internal company network that uses Internet and WWW technologies. Typical Use: Finding and sharing work documents Collaboration between employees to work in teams Communication tool Typically, only internal employees can get access Extranet Web site that allows customers and business partners limited access to organizational intranet Uses Internet and WWW technologies Add additional security through the use of a Virtual Private Network (VPN)719Portal Portal Web site that offers a broad array of resources and services; such as email newsgroup Serach engines Online shopping malls Example: yahoo!, msn, aol20Test Your Internet knowledge (4) A company has set up an Intranet to allow virtual teams to work on projects, and to provide a mean for people to share documents that might be needed for work. Which of the following group of people is more likely to get access to these two services?a) The company’s customersb) The company’s suppliersc) The company’s employeesd) All of the above21Test Your Internet knowledge (5) A company has set up an Intranet to allow virtual teams to work on projects, and to provide a mean for people to share documents that are needed for work. Which of the following protocols needs to be installed on each computer that needs to be used for getting access to the Intranet ?a) Token ringb) TCP/IPc) All of the aboved) Neither a nor b822Test Your Internet knowledge (6) Your business has 10 employees. You just bought 10 desktop computers and subscribed to Internet DSL service. Which of the following will be needed to