CH5 Notes - Comm Networks Ch.5_SN F09

CH5 Notes - Comm Networks Ch.5_SN F09 - 1...

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1 Objectives: Understand features of a contemporary network infrastructure and key networking technologies Telecommunications, Networks, and the Internet [Ch. 5; TG4] Recognize alternative transmission media, types of networks, and network services Understand the role of the Internet and the World Wide Web in information technology infrastructure IE332 F_09 Identify important tools for communication, e-Work and e- business Identify challenges posed by networking and the Internet 2 Ch. Opening Case: Hannaford Bros. Supermarkets (~150 in N. America) Problem : Lack of communications between the meat section and checkout, and between individual stores and headquarters. Hannaford Bros. HQ communications? ? IE332 F_09 Checking out Advertising meats comm? ?
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3 Typical Network Infrastructure IE332 F_09 4 Seven major trends in telecommunications: 1. Rapid innovation proliferation of new hardware devices and new alternatives for business comm. 2. Continuing telecom. deregulation has encouraged competition and created many alternatives 3. Distinctions between telephone, cable television, Internet, and satellite telecommunication are blurred 4. Growing dominance of Internet technologies in voice, video, and data communications IE332 F_09 5. Rapid growth in high-speed broadband connections to homes and businesses 6. Rapid growth in wireless and mobile devices 7. Growing scope of comm.-intense services and products
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5 1. Declining transaction costs 2. Declining agency costs Value impacts of telecommunications and Networking: 3. Increased agility 4. Higher quality management decisions 5. Declining geographical barriers 6. Declining temporal barriers IE332 F_09 7. Rapid growth in business networking and telecomm. results from the extraordinary value of participating in networks like the Internet Think: What are the impacts on work? On IEs? 6 Metcalfe’s Law IE332 F_09
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7 •A network consists of two or more connected computers Each computer on a network contains a network interface device called a network interface card (NIC) Linking network components can be by telephone wire, coaxial cable, Networks and Infrastructure or radio signal (for cell phones and wireless local area networks) Network operating system (NOS) routes and manages comm. on a network and coordinates network resources switch (hub) connects between networked computers Hubs are simple devices sending a packet of data to all other connected devices IE332 F_09 A switch is more intelligent than a hub, can filter and forward data to a specified destination router is a special communications processor used to route packets of data through different networks, ensuring that a message sent gets to the correct address 8 Components of a Simple Network IE332 F_09 NOS= Network Operating System NIC=Network Interface card
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9 Client/server computing is a distributed computing model in which much of the processing power is located 1. Client/Server Computing Three Digital Networking Technologies model in which much of the processing power is located
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This note was uploaded on 01/19/2012 for the course IE 230 taught by Professor Xangi during the Spring '08 term at Purdue University-West Lafayette.

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CH5 Notes - Comm Networks Ch.5_SN F09 - 1...

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