ITA 372 Chapter 2

Mainframe architecture

all computing intelligence resides within a powerful central host computer.

Client-server architecture

a network architecture in which each computer on the network is either a client or a server.

Client

a piece of hardware or software that makes requests of \n a more powerful server in order to utilize a shareable resource \n such as applications or data

Server

takes requests from clients and shares its resources

Two-tier architecture

comprised of the server, (back-end application) and the client (front-end application)

Fat client

a client that handles the presentation logic and business logic.

Thin client

a client that handles only the \n presentation logic

Fat server

handles the business and data access logic

Presentation logic

software logic that displays data to the user and accepts input from the user

Business logic

programming logic that specifies how business transactions are processed and what data needs to be accessed from the data storage device

Data access logic

refers to the communication with the database, which is responsible for data storage and retrieval on the physical storage device

Three-tier client-server architecture

places one or more application tiers between the client tier and the database tier

Web-based architecture

the presentation layer is split into a web server and a web browser

Web server

delivers content or services to end users over the Internet

Web browser

talks” to a server and asks it for the pages the user wants to see

Most ERP systems access

a relational database management system (RDBMS)

ERP systems can work with other databases such as an

in-memory database.

Data on an entity (something that can be uniquely identified) is \n stored in a two-dimensional table, also known as

\n relation

\n field

designed to maintain certain \n information about every row in the table.

Records

re groupings of related fields.