SIA-PQUIZ2&4

• System architecture is the conceptual structure and logical organization of a computer or computing system
• System Architecture:

  • translate the logical design of an information system into a physical structure that includes :
  • Hardware
  • Software
  • network support
  • processing method
• An effective system combines elements into :

  • Architecture or Design that is flexible, cost-effective, technically sound, and able to support information needs of the business.
• What are the system Architecture Checklist:

  • ERP - Enterprise Resource Planning
  • Initial Cost & TCO
  • Scalability
  • Web-integration
  • Legacy System Interface Requirements
  • Processing Options
  • Security Issues
• Enterprise Resource Architecture:

  • The objective of ERP is to establish a company wide strategy for using IT resource.
  • supply chain management.
• Initial Cost & TCO

  • During the final design stage, you make decision that will have a major impact on the initial costs and TCO for the new system.
• Scalability

  • also called extensibility, refers to a system's ability to expand, change on downsize easily to meet that changing need of a business enterprise.
  • especially important in implementing systems that are volume-rated. such as transaction processing system.
• Web-integration

  • an information system that includes application.
  • web-centric architecture
  • avoids many of the connectivity and compatibility problems that are typically arise.
  • E-marketplaces.
• Legacy System Interface Requirments:

  • The new system might have to interface with one or more lagacy system.
  • Interfacing new system with a legacy system involves anlysis of data formats & compatibility.
  • The analyst must know if the new application eventually will replace the legacy system.
• Processing Options:

  • In planning the architecture, designers also must consider how the system will process data - online or in batches.
  • Provision mut be made for backups and speedy recovery in the event of system failure.
• Security Issues:

  • A security threats and defenses are a major concern to a systems & Analyst.
  • the analysts must consider security issues that relate to system design and specification.
  • Web-based systems introduce additional; security concerns.
• Identify Planning the Architecture:

  • Servers
  • Clients
• Servers

  • Lecutre

  
• Clients

  • Lecture.

  
• Clients

  • Lecture.

  
• Overview

  • Lecutre

  
• Client/Server Design styles

  • Leture

  
• Fat & Chin Clients

  
• Client Server Architecture:

  • Overview
  • Client/server design style
  • fat & thein clients
  • client/server tiers
  • Middleware
  • Cost-benefits Issues
  • Client/server performance issue
• System architecture refers to the overall design and structure of a computer system
• It includes the arrangement of software, hardware, networks, and other components that make up the system
• System architecture determines how all the parts of a computer system work together to achieve the desired functionality
• It involves defining the system's structure, behavior, and performance
• System architecture plays a crucial role in ensuring that the system meets its requirements and functions effectively
• An effective system combines elements into an architecture or design that is flexible, cost-effective, technical sound, and able to support the information needs of the business
• System Architecture translate the logical design of an information system into a physical structure that includes hardware, software, network support and processing methods.
• Enterprise Resource Planning (ERP) the objective is to establish a company-wide strategy for using IT resource.

  • Supply chain management (SCM)
• Initial Cost and TCO during the final design stage, you make decisions that will have a major impact on the initial costs and TCO for the new system.
• Scalability also called Extensibility, refers to a systems ability to expand, change or downsize easily to meet the changing need of a business

  Especially important in implementing systems that are volume-rated such as transaction processing system.
• Web-integration

  an information system include application.

  Web-Cetric architecture.

  Avoid many of the connectivity and compatibility problems that typically arise.

  E-marketplace
• Legacy System Interface Requirements

  The new system might have to interface with one or more legacy systems.

  Interfacing a new system with a legacy-system involves analysis of data formats and compatibility

  The analyst must know if the new application eventually will replace the legacy system
• Processing Options

  In planning the architecture, designers also must consider how the system will process data - online or in batches.

  Provision must be made for backup and speedy recovery in the event of system failure.
• Security Issues

  Security threats and defenses are a major concern to a system analysts.

  The analyst must consider security issues that related to system design specification

  Web-based systems introduce additional security concerns.
• Servers

  • Server
  • Clients
  • Mainframe Architecture
  • Server-based processing
• Clients

  as PC technology exploded in the mid-1980s and 1990s, powerful microcomputers quickly appeared on corporate desktops.

  Users found that they could run their own word processing, spreadsheet, and database applications.

  Companies linked the stand-alone computers into networks.
• Clients

  • stands-alone Computing.
  • Local and Wide area networks
  • Client-based Processing
• Client/Server Tiers

  • Two-tier design
  • three-tier design
• FAT & THIN CLIENT

  • Network Traffic
  • Performance
  • Initial costs
  • Maintenance Costs
  • Ease of Development
• Middleware

  enables the tier to communicate and pass data back and forth.

  provides a transparent interface.

  can integrate legacy systems and web-based application.
• Cost-Benefit Issues

  Client/server systemsenable the firm to scale thesystem in a rapidly changing environment.Client/server computing also allows companies totransfer applications from expensive mainframesto less expensive client platforms.Client/server systems reduce network load andimprove response times.