CHAPTER 6Chapter OutlineLearning ObjectivesLearning Objectives (continued)6.1 What Is a Computer Network?BroadbandSize of Computer NetworksLocal Area NetworksWide Area NetworksEnterprise Network6.2 Network FundamentalsAnalog and Digital SignalsCommunications Media and ChannelsTransmission TechnologiesNetwork ProtocolsThe Four Layers of the TCP/IP ProtocolPacket SwitchingTypes of Network Processing6.3 The Internet and the World Wide WebPowerPoint PresentationAccessing the InternetSlide 22Addresses on the InternetSlide 24Internet Address exampleThe Future of the InternetThe World Wide WebBrowser Competition6.4 Network ApplicationsDiscoveryFour Large Search EnginesMetasearch EnginesPublication of Material in Foreign LanguagesPortalsAffinity Portal (example)Industrywide Portal (example)CommunicationElectronic MailCall CentersVoice CommunicationCollaborationCollaboration (continued)CrowdsourcingSoftware products supporting collaborationTelepresence SystemsE-Learning and Distance LearningBenefits of E-LearningDrawbacks of E-LearningTelecommutingTelecommuting BenefitsTelecommuting DisadvantagesChapter Closing CaseCHAPTER 6NetworksChapter Outline 6.1 What Is a Computer Network? 6.2 Network Fundamentals 6.3 The Internet and the World Wide Web 6.4 Network ApplicationsLearning Objectives1. Define the term computer network, and compare and contrast the two major types of networks.2. Describe the differences among the three types of wireline communications media, and discuss the main advantages and disadvantages of each type.3. Differentiate between the Internet and the World Wide Web, and describe the most common methods for accessing the Internet.Learning Objectives (continued)4. Identify six major categories of network applications, provide an example of each, and explain how that application supports business functions.6.1 What Is a Computer Network?In a computer network, connected computers: Work together Are interdependent Exchange data with each other© Ilin Sergey/Age Fotostock America, Inc.BroadbandFiber opticsCoaxial cableSource: Philip Hatson/Photo Researchers, IncSource: GIPhotoStock/Photo Researchers, IncSize of Computer NetworksHome computer network National computer networkGlobal computer networkLocal Area NetworksWide Area Networks© Ilin Sergey/Age Fotostock America, Inc.Enterprise Network6.2 Network FundamentalsAnalog and Digital SignalsCommunications Media and ChannelsTransmission TechnologiesNetwork ProtocolsTypes of Network ProcessingAnalog and Digital SignalsCommunications Media and ChannelsTwisted-pair wireCoaxial cableFiber opticsSources: deepspacedave/Shutterst ock, GIPhotoStock/Photo Researchers, Inc, Philip Hatson/Photo ResearchersTransmission TechnologiesDigital subscriber line (DSL)Asynchronous transfer mode (ATM)Synchronous optical network (SONET)T-carrier systemNetwork ProtocolsEthernetTransmission Control Protocol/Internet Protocol (TCP/IP)The Four Layers of the TCP/IP ProtocolPacket SwitchingTypes of Network ProcessingClient/server computingPeer-to-peer processing© Matthias Pahl/Age Fotostock America, Inc.© Toh Kheng Ho/Age Fotostock America, Inc.6.3 The Internet and the World Wide WebAccessing the InternetThe Future of the InternetThe World Wide WebImage of the Internet in the United StatesSource: © Mark Stay/iStockphoto)An Intranet© Corbis/Age Fotostock America, Inc.Accessing the InternetConnecting via an online serviceInternet kiosksDial-upDSLAccessing the InternetCable ModemSatelliteWireless Fiber to the HomeAddresses on the InternetIPv432 bits 128 bitsIPv6Addresses on the InternetDomain namesTop-level domainName of the organizationName of the specific computerInternet Address examplewww.business.auburn.eduTop level domain: eduName of the organization: Auburn UniversityName of the specific computer: businessThe Future of the InternetSource: © Mark Stay/iStockphoto)The World Wide WebThe World Wide WebNot the same thing as the InternetHome pageUniform resource locator© Ilin Sergey/Age Fotostock America, Inc.Browser Competition © Matthias Pahl/Age Fotostock America, Inc.6.4 Network ApplicationsDiscoveryCommunicationCollaborationE-Learning and Distance LearningVirtual UniversitiesTelecommutingDiscoverySearch enginesMetasearch enginesDiscovery of material in foreign languagesPortalsFour Large Search EnginesThe largest search engines are:•Google•Yahoo•Bing•Baidu © Claver Carroll/Age Fotostock America, Inc.Metasearch EnginesFigure 4.10 The KartOO home page (www.kartoo.com)Publication of Material in Foreign LanguagesPortalsCommercial (public) portalsAffinity portalsMobile portalsCorporate portalsIndustry wide portalsAffinity Portal (example)Figure 4.12 University of West Georgia affinity portal. (Courtesy of West Georgia University.)Industrywide Portal (example)Figure 4.13 The TruckNet portalCommunicationElectronic mail (e-mail)Web-based call centers (customer call center)Electronic chat roomVoiceUnified © Mario S Ragma Jr/Age Fotostock America, Inc.Electronic Mail Source: Stockphoto4u/iStockphotoCall Centers© Dinodia/Age Fotostock America, Inc.Voice Communication Two examples of Internet telephony (VoIP) Skype VonageCollaboration Work group Virtual group (team)Source: Howard Kingsnorth/The ImageBank/Getty Images, Inc.Collaboration (continued)Virtual collaborationCollaboration softwareElectronic TeleconferencingE-Learning and Distance LearningCrowdsourcing© YURI ACURS/Age Fotostock America, Inc.Software products supporting collaborationMicrosoft SharepointIBM Lotus QuickrGoogle DocsJive SoftwareTelepresence SystemsSee video on Cisco MagicSource: PRNews Foto/Polycom, Inc./NewsComE-Learning and Distance LearningE-LearningDistance learning Source: Mike Flippo/ShutterstockBenefits of E-LearningSelf-paced learning increases content retention.Online materials deliver high-quality, current content.Students have the flexibility of learning from any place at any time at their own pace.Learning time generally is shorter, and more people can be trained due to faster training time.Training costs can be reduced.Drawbacks of E-LearningInstructors may need training to be able to teach electronically.The purchase of additional multimedia equipment may be necessary.Students must be computer literate and may miss the face-to-face interaction with instructors.There are issues with assessing students’ work, as instructors really do not know who completed assignments.TelecommutingSource: © Maria