BDC4e Chapter 14 - Chapter 14: Local Area Network...

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Chapter 14: Local Area Network Technology Business Data Communications, 4e
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PC Networks Client/Server Communication Shared databases Shared hardware resources Shared Internet access Peer-to-Peer Communication Sharing work and information with colleagues Low cost is high priority Attachment costs in the hundreds of dollars
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Backend & Storage Area Networks “Computer room networks” Interconnect large systems (mainframes, supercomputers, etc) Key requirement is high-speed bulk transfer Usually limited distance, few drops Speed more important than cost Attachment costs in the thousands of dollars
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High-Speed Office Networks Increased processing and transfer requirements in many graphics-intensive applications now require significantly higher transfer rates Decreased cost of storage space leads to program and file bloat, increased need for transfer capacity Typical office LAN runs at 1-20mbps, high-
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Backbone Local Networks Used instead of single-LAN strategy Better reliability Higher capacity Lower cost
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Factory Networks High capacity Ability to handle a variety of data traffic Large geographic extent High reliability Ability to specify and control transmission delays
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Tiered LANs Cost of attachment to a LAN tends to increase with data rate Alternative to connecting all devices is to have multiple tiers Multiple advantages Higher reliability Greater capacity (less saturation) Better distribution of costs based on need
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Tiered LAN Strategies Bottom-up strategy: individual departments create LANs independently, eventually a backbone brings them together Top-down strategy: management develops an organization-wide networking plan
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Tiered LAN Diagram
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LAN Topology Arrangement of workstations in a shared medium environment Logical arrangement (data flow) Physical arrangement (cabling scheme)
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BDC4e Chapter 14 - Chapter 14: Local Area Network...

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