Management Information Systems

1
Management Information Systems

• Networking Overview

2
Overview

• Summary of telecommunications
• Business value
• Trends
• General network model
• Network types
• Telecommunications Alternatives
• Case discussion (CitiBank/ATT)

3
Internetworked Enterprises
4
Business Value

• Overcome barriers
• Geographic
• Time
• Structural
• Establish strategic relationships
• Rapid transaction processing
• Effective information exchange
• See Figure 6.3

5
Telecommunications Trends

• Driving forces
• ATT breakup (1984)
• Act of 1996
• See Figure 6.4
• Industry
• Technology
• Application

6
More vendors, carriers, alliances, and network
services,accelerated by deregulation Internet
Growth
Industry Trends
More Internet, interconnected local
global digital networks, improved transmission
channels
Technology Trends
More electronic commerce, enterprise
collaboration, online business operations etc.
via networks
Application Trends
7
The Internet

• Information Superhighway?
• Basic applications
• E-Mail
• WorldWide Web
• FTP
• Telnet
• Others chat, video phone, . . . (continually
  increasing)

8
A General Network Model
9
Network Components

• Terminals -- input/output
• Processors -- convert signals, manage
• Channels -- use combinations of media
• Computers -- process data information
• Software -- control activities, monitor, . . .

10
Types of Networks

• LAN
• WAN
• Internetworks
• Intranets
• Extranets
• Client/Server networks
• Interorganizational networks

11
A Local Area Network
PC
PC
PC
Shared Printer
PC
PC
Internetwork Processor to Other Networks
12
A Local Area Network
13
Intranets Extranets
14
Internetworked Enterprise
The Internet
Company
Intranets
Extranet
Extranet
Intranet
Intranets
Intranets
Customer
Supplier
Intranets
Extranet
Extranet
Other Company Locations
15
Telecommunications Alternatives

• Media
• Processors
• Software
• Network topologies
• Architectures protocols
• Switching
• Access

16
Network Components / Alternatives
Network Component
Examples of Alternatives
Media
Twisted-pair wire, coaxial cable, fiber optics,
microwave radio, communications satellites,
cellular phone systems, LAN, radio, infrared
Processors
Modems, multiplexers, switches, routers, hubs,
gateways, front-end processors, private branch
exchanges
Software
Network operating systems, telecommunications
monitors, web browsers, middleware
Channels
Analog/digital switched/nonswitched,
circuit/message/packet/cell switching, bandwidth
alternatives
Topology/ Architecture
Point to point, multidrop, star/ring/bus, OSI,
TCP/IP
17
Typical Media Alternatives

• UTP
• CATIII 10Base-T (100Mbps)
• CATV 100Base-T (100Mbps)
• Fiber optic (up to 10,000 times as fast)

18
The OSI Architecture
19
The Internets TCP/IP
Application on Process Layer
Host-to-Hose Transport Layer
Internet Protocol (IP)
Network Interface
Physical Layer
20
To Be Continued . . .

• Chapter 8 -- Electronic Commerce
• Chapter 9 -- Internet/Intranet/Extranet
• Other?