Mis jaiswal-chapter-02

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Mis jaiswal-chapter-02

  1. 1. Chapter 2 Information Systems Infrastructure
  2. 2.  Is it about IT Infrastructure? Is it about Network Infrastructure?  ISI is:  a base of shared technological, human, and organizational capabilities that provides the foundation for computer-based business application systems in the form of services to a range of users  ISI includes the following elements: i. HR and organizational capabilities ii. IS architecture iii. data center network iv. network connectivity v. bandwidth management vi. communication protocols vii. network management
  3. 3.      Technological capabilities of people Attitudes of people regarding the use of IS Culture Structure Processes
  4. 4.     Mainframe Computing Architecture Client-Server Computing Architecture Web Computing Architecture Distributed Component Architecture
  5. 5. Mainframe Computing Architecture Mainframe Data Management Business Processes Analysis & Presentation Terminal
  6. 6. Two-tier Client-Server Architecture Data Base Management Systems User interface Business Logic
  7. 7. Three-Tier Client-Server Architecture Application Servers Clients Broker/ Naming Server User Interface Connectivity Data models Applications Connectivity Management ODBC Data Base Servers Data Base
  8. 8. The “Web” as a Client-Server System Servers (ERP, Web and database) Browser Software (Netscape) Page Client • Presentation Internet/ Extranet/ intranet Servers (ERP, Web and database) Mumbai e.g., HLL New Delhi e.g., HLL Server • Simple data [static Web pages] • Business logic (cgi scripts) with access to data (often RDBMS) [dynamic Web pages]
  9. 9. Schematic of Data Center Network Client WAN Clout Client Campus Backbone D a t a C e n t e r Switch Subnet 1 Application Server Application Server Application Server Database Server Database Server Database Server Subnet 2

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