chapter 10: connecting networksziarko/cs335/cs335_wz9.pdf2 connecting networks layer 1 connections...
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Chapter 10: Connecting Networks
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Connecting Networks
Layer 1 connections (physical)Layer 1 connections (physical)Layer 2 connections (link)Layer 3 connections (network)Layer 7 connections (application)
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Layer 1: Repeaters
Repeaters
Frame re transmissionFrame re-transmissionConnecting two LAN’s onlySignal regenerationThe same collision domainN bilit t t t lNo ability to execute any protocols
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Layer 1: Hubs
Hubs
Multiport repeatersMultiport repeatersSame functions as repeaters
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Layer 2: Bridges
Bridges
Connecting two LAN’s onlyConnecting two LAN s onlyBetter securitySeparation of collision domains Ability to excecute Layer 2 protocols:
d t ti- error detection- frame formatting- frame routing
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Bridge Routing Tables
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Two Bridges Connecting 2 LAN’s
Multiple LAN’s with Loops
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Switches
Multiport bridgesMultiport bridgesSame basic functions as bridges
Connections Using Hubs and Switches
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Connections Using Only Switches
Example Arrangment
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Virtual LAN’s
VLAN’s across Switches
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Layer 3 Connections
Generalized Network Topology
Layer 3: Routers
Applicable to WAN’s routingApplicable to WAN s routingEmploy sophisiticated algorithms and tables for routing decisions
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Connection Costs
Partial Routing Tables
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Routing Matrix
Distributed Routing: No Central Control
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Domains in Hierarchical Routing
Hierarchical Arrangement of Domain Nodes