Architectural flexibility allows for the deployment of multiple tiers of a system across different hardware or virtualized environments. This separation of tiers enables the system to scale and be more reliable. For example, the presentation tier can be deployed on a separate server or cloud environment from the application and database tiers, allowing for easier scaling and fault-tolerance. Architectural flexibility also allows for customization of each tier to meet specific needs, such as performance requirements or security constraints, without impacting the other tiers. Overall, architectural flexibility supports system separation of tiers by enabling the distribution of system tiers across different environments and enabling customization of each tier.
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