CHAPTER 7Chapter Seven OverviewLEARNING OUTCOMESNETWORK BASICSSlide 5Slide 6Slide 7ARCHITECTUREPeer-to-Peer NetworksClient/Server NetworksTOPOLOGYSlide 12PROTOCOLSOpen Source Interconnection Model (OSI)EthernetTransmission Control Protocol/ Internet ProtocolVoice over IP (VoIP)MEDIAWire MediaSlide 20Wireless MediaWIRELESS FIDELITY (WI-FI)The Value of Timely InformationBUSINESS DRIVERS FOR WIRELESS TECHNOLOGIESSlide 25Technology Adoption (US)Slide 27BluetoothRadio Frequency IdentificationRFIDSatelliteGlobal Positioning SystemMcGraw-Hill/Irwin©2008 The McGraw-Hill Companies, All Rights ReservedCHAPTER 7CHAPTER 7NETWORKS, TELECOMMUNICATIONS, AND WIRELESS COMPUTINGNETWORKS, TELECOMMUNICATIONS, AND WIRELESS COMPUTING7-2Chapter Seven Overview•SECTION 7.1 – NETWORKS AND TELECOMMUNICATIONS–Network Basics–Architecture–Topology–Protocols–Media–E-Business Networks•SECTION 7.2 – WIRELESS COMPUTING–Wireless Fidelity–Business Drivers for Wireless Technologies–Advantages of Enterprise Mobility–The Future of Wireless7-3LEARNING OUTCOMES1. Compare LANs, WANs, and MANs2. List and describe the four components that differentiate networks3. Compare the two types of network architectures4. Explain topology and the different types found in networks5. Describe TCP/IP along with its primary purpose6. Identify the different media types found in networks7-4NETWORK BASICS•Telecommunication system - enable the transmission of data over public or private networks•Network - a resource-sharing system created by linking two or more computers following an establishing standards or protocols7-5NETWORK BASICS•The three types of networks include:–Local area network (LAN): One building, a small group of buildings, office, or a home.•Metropolitan area network (MAN): Joins LANS across campuses •Wide area network (WAN): Across the country or around the world (Internet)7-6NETWORK BASICS7-7NETWORK BASICS•Networks are differentiated by the following:–Architecture - peer-to-peer, client/server–Topology - bus, star, ring, hybrid, wireless–Protocols - Ethernet, Transmission Control Protocol/Internet Protocol (TCP/IP)–Media - coaxial, twisted-pair, fiber-optic7-8ARCHITECTURE•There are two primary types of architectures–Peer-to-peer (P2P) network –Client/server network–http://www.youtube.com/watch?v=Ve7_4ot-Dzs7-9Peer-to-Peer Networks•Peer-to-peer (P2P) network - any network without a central file server and in which all computers in the network have access to the public files located on all other workstations7-10Client/Server Networks•Client - a computer that is designed to request information from a server•Server - a computer that is dedicated to providing information in response to external requests–Client/server network - model for applications in which the bulk of the back-end processing takes place on a server, while the front-end processing is handled by the clients7-11TOPOLOGY•Network topology - refers to the geometric arrangement of the actual physical organization of the computers and other network devices) in a network–Bus–Star–Ring–Hybrid–Wireless7-12TOPOLOGY7-13PROTOCOLS•Protocol - a standard that specifies the format of data as well as the rules to be followed during transmission (e.g. language)•Interoperability - the capability of two or more computer systems to share data and resources, even though they are made by different manufacturers7-14Open Source Interconnection Model (OSI)7-15Ethernet•Ethernet - a physical and data layer technology for LAN networking7-16Transmission Control Protocol/ Internet Protocol•Transmission Control Protocol/Internet Protocol (TCP/IP) - provides the technical foundation for the public Internet as well as for large numbers of private network•TCP/IP applications–File transfer protocol (FTP)–Simple mail transfer protocol (SMTP)–Hypertext transfer protocol (HTTP)–Simple network management Protocol (SNMP)7-17Voice over IP (VoIP)•Voice over IP (VoIP) - uses TCP/IP technology to transmit voice calls over long-distance telephone lines•Can you recall some companies that offer VOIP?7-18MEDIA•Network transmission media - refers to the various types of media used to carry the signal between computers–Wire media (guided)–Wireless media (unguided)7-19Wire Media•Wire media - transmission material manufactured so that signals will be confined to a narrow path and will behave predictably•Three most commonly used types include: 1. Twisted-pair wiring 2. Coaxial cable3. Fiber optic (or optical fiber)7-20Wire Media7-21Wireless Media•Wireless media - natural parts of the Earth’s environment that can be used as physical paths to carry electrical signals•Wireless fidelity (wi-fi) – a means of linking computers using infrared or radio signals•Common examples of wireless devices include:–Cellular phones and pagers–Global positioning systems (GPS)–Cordless computer peripherals–Home-entertainment-system control boxes–Two-way radios–Satellite television7-22WIRELESS FIDELITY (WI-FI)•Disruptive wireless technologies–WiMax wireless broadband–Radio frequency identification tags (RFID)7-23The Value of Timely Information •Timeliness is an aspect of information that depends on the situation–Real-time information – immediate, up-to-date information–Real-time system – provides real-time information in response to query requests7-24BUSINESS DRIVERS FOR WIRELESS TECHNOLOGIES•Mobile and wireless are often used synonymously, but actually denote two different technologies–Mobile technology - means the technology can travel with the user, but it is not necessarily in real-time–Wireless technology - gives users a live (Internet) connection via satellite or radio transmitters7-25BUSINESS DRIVERS FOR WIRELESS TECHNOLOGIES•Drivers of wireless technology growth include:–Universal access to information and applications –The automation of business processes–User convenience, timeliness, and ability to conduct business 24x77-26Technology Adoption (US)Forbes Magazine July 7th, 19977-27BUSINESS DRIVERS FOR WIRELESS TECHNOLOGIES•Wireless devices changing business include:–Wireless local area network (wLAN)–Cellular phones and pagers–Cordless computer peripherals–Satellite television–WiMax wireless broadband–Security sensor7-28Bluetooth•Bluetooth – an omnidirectional wireless technology that provides limited-range voice and data transmission over the