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2.2.2. Three-Tier (Traditional)

Separates the network into three distinct layers: Access, Distribution, and Core.

Best for: Large enterprise networks, campus environments

LayerFunctionTypical Devices
CoreHigh-speed backbone, minimal processingL3 switches (Catalyst 9500)
DistributionAggregates access switches and links them to the core; policy enforcement, routing, route summarization, filteringL3 switches (Catalyst 9400)
AccessEnd-user connectivity, port securityL2/L3 switches (Catalyst 9200)
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Alvin Varughese
Written byAlvin Varughese
Founder•20 professional certifications