IS IT Systems

Question 1

Definition of Information System

Answer 1

A Computer based Information System is a combination of
people, IT and business processes

1.People
2.Computer System
3.Data
4.Network

Question 2

Dimensions of Information Systems

Answer 2

Organization,Tehnology,Managment

IT provides platform that IS is built on

Question 3

IT Evolution

Answer 3

Mainframe->Client-Server->Internet->Real-Time Infrastructure

Question 4

IIN ( Inteligent Information Network)

Answer 4

Framework for providing an network infrastructure, network services,
and network applications

Question 5

IT Infrastructure

Answer 5

IT Infrastructure has seven main components
1. Computer hardware platforms
2. Operating system platforms
3. Enterprise software applications
4. Data management and storage
5. Networking/telecommunications platforms
6. Internet platforms
7. Consulting system integration services

Question 6

Computer Hardware platforms

Answer 6

Client machines
Desktop PCs, mobile devices—PDAs, laptops
Servers
Blade servers: ultrathin computers stored in racks
Mainframes:
IBM mainframe equivalent to thousands of blade servers
Top chip producers: AMD, Intel, IBM
Top firms: IBM, HP, Dell, Sun Microsystems

Question 7

Data Management and Storage

Answer 7

– Database software:
• IBM (DB2), Oracle, Microsoft (SQL Server), Sybase
(Adaptive Server Enterprise), MySQL – Physical data storage:
• EMC Corp (large-scale systems), Seagate, Maxtor,
Western Digital – Storage area networks (SANs):
• Connect multiple storage devices on dedicated
network

Data Management and Storage

Question 8

Networking /Telecommunications Platforms

Answer 8

• Telecommunications services
• Network operating systems:
• Network hardware providers:

Question 9

Consulting and System Integration Services

Answer 9

Even large firms do not have resources for full range of support for new, complex infrastructure
– Software integration: ensuring new infrastructure works with legacy systems – Legacy systems: older TPS created for mainframes that would be too costly to replace or redesign
– Accenture, IBM Global Services, EDS, Infosys, Wipro

Question 10

Contemporary Hardware Platform Trends

Answer 10

1.The mobile digital platform
2.BYOD (Bring your own device)
-Allowing employees to use personal mobile devices in workplace
3.Consumerization of IT
–New information technology emerges in consumer markets
first and spreads to business organizations
–Forces businesses and IT departments to rethink how IT
equipment and services are acquired and managed
4.Grid computing
– Connects geographically remote computers into a single network to
combine processing power and create virtual supercomputer
– Provides cost savings,speed,agility
5.Virtualization
– Allows single physical resource to act as multiple resources
– Reduces hardware and power expenditures
6.Cloud computing
–In cloud computing, hardware and software capabilities are a pool of
virtualized resources provided over a network, often the Internet.
–Businesses and employees have access to applications and IT
infrastructure anywhere, at any time, and on any device.

7.Green computing
– Practices and technologies for manufacturing, using, disposing of computing and networking hardware

8.Autonomic computing
– Industry-wide effort to develop systems that can configure, heal themselves when broken, and protect themselves from outside intruders
– Similar to self-updating antivirus software; Apple and Microsoft
both use automatic updates

Question 11

Contemporary Software Platform Trends

Answer 11

1.Open-source software
2.Linux
3.Web Services
4.SOA: Service-oriented architecture

Three external sources for software:
1.Software packages and enterprise software
2.Software outsourcing
Contracting outside firms to develop software
3.Cloud-based software services
Software as a service (SaaS)
Accessed with Web browser over Internet
Service Level Agreements (SLAs): formal agreement with service
provider