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Introduction to IT Infrastructure - Lecture Notes | BU 294, Study notes of Introduction to Business Management

Material Type: Notes; Professor: Tollison; Class: Intro to Information Systems; Subject: Business; University: Mississippi University for Women; Term: Fall 2007;

Typology: Study notes

Pre 2010

Uploaded on 08/07/2009

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Introduction to IT Infrastructure
October 26 – November 1
What is an IT Infrastructure :
oAn IT infrastructure includes the hardware, software, telecommunications
equipment that, when combined, provide the underlying foundation to support
the organization’s goals (p. 316).
oAs a knowledge worker, you will be continually faced with questions regarding
how the IT infrastructure can best support your organization’s goals (p. 316).
oAs your business and the technology change, you will have the answer the
question time and time again (p. 316).
IT Infrastructure Overview :
oThe primary components of any IT infrastructure include client/server networks,
the Internet, and n-tier infrastructures (p. 317).
oClient/server networks :
A client/server network is a network in which one or more computers are
servers and provide services to the other computers, called clients (p.
317).
A basic client/server network is known as a 2-tier infrastructure since
they are only two tiers – the client and the server (p. 319).
Most software is located on the client PC (p. 319).
This leads to a situation in which workers are storing data on their
computers and not be accessible to co-workers (p. 319).
oN-tier infrastructures :
The n represents the number of tiers (p. 319).
You can address the problems of 2-tier infrastructure by moving to a 3-
tier infrastructure (p. 319).
A 3-tier infrastructure contains clients, applications servers, and data
servers (p. 319):
Application servers are used to store application software.
Data servers maintain shared information.
pf3

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Download Introduction to IT Infrastructure - Lecture Notes | BU 294 and more Study notes Introduction to Business Management in PDF only on Docsity!

Introduction to IT Infrastructure October 26 – November 1

 What is an IT Infrastructure:

o An IT infrastructure includes the hardware, software, telecommunications

equipment that, when combined, provide the underlying foundation to support the organization’s goals (p. 316). o As a knowledge worker, you will be continually faced with questions regarding how the IT infrastructure can best support your organization’s goals (p. 316). o As your business and the technology change, you will have the answer the question time and time again (p. 316).

 IT Infrastructure Overview:

o The primary components of any IT infrastructure include client/server networks ,

the Internet , and n-tier infrastructures (p. 317).

o Client/server networks:

 A client/server network is a network in which one or more computers are

servers and provide services to the other computers, called clients (p. 317).  A basic client/server network is known as a 2-tier infrastructure since they are only two tiers – the client and the server (p. 319).  Most software is located on the client PC (p. 319).  This leads to a situation in which workers are storing data on their computers and not be accessible to co-workers (p. 319).

o N-tier infrastructures:

 The n represents the number of tiers (p. 319).

 You can address the problems of 2-tier infrastructure by moving to a 3-

tier infrastructure (p. 319).  A 3-tier infrastructure contains clients, applications servers, and data servers (p. 319):

 Application servers are used to store application software.

 Data servers maintain shared information.

o The Internet:

 Today, most employees require an Internet connection. One of the decisions you will make regarding your IT infrastructure (p. 318).  78% of companies detect employee abuse of their Internet access privileges. Types of abuse include playing games, downloading movies, listening to music, gambling, trading stocks, e-mailing jokes, and even distributing critical company information (p. 318).

 Elements of an Infrastructure:

o An information view element concerns how information is viewed and user

events are received (p. 320).

o The business logic element relates to the maintenance of software and protecting

information from unauthorized access by the clients (p. 322).

o Data storage and manipulation is responsible for data storage and manipulation

(p. 327).

 Information Views:

o An intranet is an internal organizational Internet that is guarded against outside

access by a special security feature called a firewall (p. 320).  An intranet is a tool for presenting organizational information as it provides a central location where employees can find information such as benefits, schedules, strategic directions, and employee directories.  The primary benefit of an intranet is that people outside the organization cannot access it.

o An extranet is an intranet that is restricted to an organization and certain

outsiders, such as customers and suppliers (p. 320)  Many companies are building extranets as they begin to realize the tremendous benefit of offering individuals outside the organization access to intranet-based information.