CCNA Explorer 3 LAN Design

Switched LAN Architecture

Hirarchical Network Design

Benefits of a Hirarchical Network Scalability Hierarchical netowrk can be expanded easily Redundancy Redundancy at the core and distribution level ensure path availability Performance Link aggregation between levels and high-performance core and distribution level switches allow for near wire-speed throughout the network Security Port security at the access level and policies at the distribution level make the network more secure Manageability Consistency between switches at each level makes management more simple Maintainablity The modularity af hierarchical design allows for the network to scale without becoming overly complicated Network diameter bandwith Aggregation Redundant Links Converged networks - One to rule them all Voice network Video network Data network Matching Switches to Specific LAN Functions Locate heavy traffic servers close to the users Bandwidth aggregation and switch forwarding rates are important factors to consider when attempting to eliminate bottlenecks Switches selected for data centers should be higher performing switches than the switches you would find in the wiring closets at the access layer Topology Diagrams Switch Form Factors Forwarding rates Cisco Catalyst Switch Guide Link Aggregation Switch faetures: PoE Switch faetures: L3 Access Layer features Distribution Layer features Core Layer features Features of Cisco Catalyst Switches Summary