Architecture

Cut	Description
User Interface	Ultra-thin client: Just echos out character by character with no JavaScript or links
↕︎	UI on Client: Processing is allowed on client side just for displaying; Browser renders static HTML.
Application	Client does some processing; Validates forms before submitting
↕︎	Thick Client: Connects directly to database manager; Has a native look/feel.
Data	Cache data on client; Responsive and less network congestion.

Thin Client Advantages Over A Thick Client

Stateless

Performance

• 1 (expensive) call to get back a ton of data
• Computations on the server side won't slow down the client

Flexibility

• You can update the app without changing the client logic

Robustness

• You can log data at the app level and it won't be presented to the user

Security

• Authentication works better if the user doesn't have access to all the company data

Skeleton 4-Tier

• User Interface
• Presentation Layer
• Business Logic
• Data

Skeleton n-Tier

• User Interface
• Caching
• Presentation Layer
• Business Logic
• Workflow
• Business Logic
• Data