2 CHAPTER 7: LEARNING OUTCOMES Explain the five different networking elements creating a connected world.Identify the benefits of a connected world.Identify the challenges of a connected world.Explain the different wireless network categories.Explain the different wireless network business applications.Identify the benefits of business mobility.Identify the challenges of business mobility.
3 OVERVIEW OF A CONNECTED WORLD Network CategoriesLocal Area Network (LAN)—Connects a group of computers in close proximity, such as in an office building, school, or homeWide Area Network (WAN)—Spans a large geographic area such as a state, province, or countryMetropolitan Area Network (MAN)—A large computer network usually spanning a city
4 OVERVIEW OF A CONNECTED WORLD Network ProvidersNational Service Providers (NSPs)—Private companies that own and maintain the worldwide backbone that supports the InternetNetwork Access Points (NAPs)—Traffic exchange points in the routing hierarchy of the Internet that connect NSPsRegional Service Providers (RSPs)—Offer Internet service by connecting to NSPs, but they also can connect directly to each other
5 OVERVIEW OF A CONNECTED WORLD Network Access TechnologiesBandwidth—The maximum amount of data that can pass from one point to another in a unit of timeBitBit RateModemBroadband—A high-speed Internet connection that is always connectedDigital Subscriber LineInternet Cable ConnectionT1 Lines
6 OVERVIEW OF A CONNECTED WORLD Network ProtocolsProtocol—A standard that specifies the format of data as well as the rules to be followed during transmissionTransmission Control Protocol/Internet Protocol (TCP/IP)—Provides the technical foundation for the public Internet as well as for large numbers of private networksDomain Name System—Converts IP addresses into domains
7 OVERVIEW OF A CONNECTED WORLD Network ConvergenceNetwork Convergence—The efficient coexistence of telephone, video, and data communication within a single network, offering convenience and flexibility not possible with separate infrastructuresUnified Communication (UC)—The integration of communication channels into a single servicePeer-to-Peer (P2P)—A computer network that relies on the computing power and bandwidth of the participants in the network rather than a centralized serverVoice over IP (VoIP)—Uses IP technology to transmit telephone callsInternet Protocol TV (IPTV)—Distributes digital video content using IP across the Internet and private IP networks
8 BENEFITS OF A CONNECTED WORLD Sharing ResourcesThe primary resources for sharing include:Intranet, Extranet, and Virtual Private NetworkProviding OpportunitiesUsing networks, they can order parts electronically when needed, reducing the need for large inventories and enhancing efficiencyReducing TravelNetworks provide the means for videoconferencing
9 CHALLENGES OF A CONNECTED WORLD SecuritySSL Certificate—An electronic document that confirms the identity of a website or server and verifies that a public key belongs to a trustworthy individual or companySecure Hypertext Transfer Protocol (SHTTP or HTTPS)—A combination of HTTP and SSL to provide encryption and secure identification of an Internet serverSocial, Ethical, and Political IssuesDigital Divide—A worldwide gap giving advantage to those with access to technology
10 WIRELESS NETWORK CATEGORIES Personal Area NetworksPersonal Area Networks (PAN)—Provides communication over a short distance that is intended for use with devices that are owned and operated by a single userBluetooth—Wireless PAN technology that transmits signals over short distances between cell phones, computers, and other devicesWireless LANsWireless LAN (WLAN)—A local area network that uses radio signals to transmit and receive data over distances of a few hundred feetWireless Fidelity (Wi-Fi)—A means by which portable devices can connect wirelessly to a local area network, using access points that send and receive data via radio waves
11 WIRELESS NETWORK CATEGORIES Wireless MANWireless MAN (WMAN)—A metropolitan area network that uses radio signals to transmit and receive dataWorldwide Interoperability for Microwave Access (WiMAX)—A communications technology aimed at providing high-speed wireless data over metropolitan area networksWireless WAN—Cellular Communication SystemWireless WAN (WWAN)—A wide area network that uses radio signals to transmit and receive dataSmartphone—Offer more advanced computing ability and connectivity than basic cell phones
12 WIRELESS NETWORK CATEGORIES Wireless WAN—Cellular Communication System3G—A service that brings wireless broadband to mobile phonesStreaming—A method of sending audio and video files over the InternetWireless WAN—Satellite Communication SystemSatellite—A space station that orbits the Earth receiving and transmitting signals from Earth-based stations over a wide area
13 BUSINESS APPLICATIONS OF WIRELESS NETWORKS Radio-Frequency Identification (RFID)—Uses electronic tags and labels to identify objects wirelessly over short distancesGlobal Positioning System (GPS)—A satellite-based navigation system providing extremely accurate position, time, and speed informationGeographic Information System (GIS)—Consists of hardware, software, and data that provide location information for display on a multidimensional mapLocation-Based Services (LBS)—Applications that use location information to provide a service
14 BENEFITS OF BUSINESS MOBILITY Enhances mobilityProvides immediate data accessIncreases location and monitoring capabilityImproves work flowProvides mobile business opportunitiesProvides alternative to wiring
15 CHALLENGES OF BUSINESS MOBILITY The mobile employee has become the norm rather than the exception, driven by lifestyle choices, productivity gains, and technology improvementsProtecting against theftProtecting wireless connectionsPreventing viruses on a mobile deviceAddressing privacy concerns with RFID and LBS
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