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Software Architecture: UML, MVC, and Enterprise Patterns

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Which of the following are NOT true about 2-tier architecture models ?

  1. Clients may be validation intensive,consequently requiring powerful hardware
  2. Any change to one tier typically affects both tiers
  3. Represents a single point of failure
  4. Each client makes a direct connection with the server
  5. They are not very maintainable
  6. They are quite manageable
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