ch05.pptx - N ETW O RK G U ID E TO N ETW O RKS 6 TH ED ITIO...

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N ETW O R K + G U ID E TO N ETW O R K S 6 TH ED ITIO N Chapter 5 Topologies and Ethernet Standards
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Sim ple Physical Topologies Physical topology Physical network nodes layout Depicts broad scope Does not specify: Device types Connectivity methods Addressing schemes Fundamental shapes Bus, ring, star Hybrid
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Star Star topology Node connects through central device Router or switch Physical medium Twisted pair or fiber-optic cabling Single cable connects only two devices Advantage Fault tolerant Flexible
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Star (cont’d.) Most popular fundamental layout Modern Ethernet networks based on star topology 1024 addressable logical network nodes maximum Figure 5-3 A star topology network Courtesy Course Technology/Cengage Learning
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Backbone Netw orks Cabling connecting hubs, switches, routers More throughput ( AGGREGATE LINES) Burst-able lines Large organizations Fiber-optic backbone Cat 5 or better for hubs, switches Enterprise-wide network backbones Complex, difficult to plan Enterprise Entire organization Significant building block: backbone
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Distributed Backbone Connectivity devices Connected to hierarchy of central
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