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BDC5eChapter9 - Chapter 9 LAN Architecture Protocols...

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Chapter 9: LAN Architecture & Protocols Business Data Communications, 5e
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Personal Computer LANs Client/server communication Shared resources Peer-to-peer communication Low cost is high priority
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Backend & Storage Area Networks “Computer room networks” High data rate High-speed interface Distributed access Limited distance Limited number of devices
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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- speed alternatives run at 100+
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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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