Subject: Mobile Computing

Difficulty: Medium

Marks: 4 Marks

First Tier/ Layer

• User Interface/Presentation Layer – deals with the user facing device handling & rendering.

• This tier includes a user interfacing components like Textbox, Labels, Checkboxes, etc.

Second Tier/Layer

• Process Management/application Layer – deals with Business logic & Rules.

• It is capable of accommodating hundreds users.

• The middle process management tier controls transactions & asynchronous queuing to ensure reliable completion of transaction

Third Tier/Layer

• Database Management/Data Tier – deals with DB management & access.

• The three tier architecture is better suited for an effective networked client / server design

• It provides increased performance , flexibility, maintainability, reusability, & scalability

• These characteristics encertain the use of 3 tier architecture useful for internet applications & net centric systems

• To design a system for mobile computing , we need to keep in mind that the system will used through any network, any bearer, any agent, any device etc.