1 THE INTERNET AND THE NEW INFORMATION NEW INFORMATIONTECHNOLOGYINFRASTRUCTURE.

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THE INTERNET AND THETHE INTERNET AND THE

NEW INFORMATIONNEW INFORMATION

TECHNOLOGY TECHNOLOGY

INFRASTRUCTUREINFRASTRUCTURE

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THE NEW INFORMATION TECHNOLOGY (IT) INFRASTRUCTURE FOR THE DIGITAL FIRM

Enterprise NetworkingEnterprise Networking

• Arrangement of organization’s hardware, Arrangement of organization’s hardware, software, network, and data resources software, network, and data resources

• Creates a company-wide network linking Creates a company-wide network linking many smaller networksmany smaller networks

InternetworkingInternetworking• Links separate networks into an Links separate networks into an

interconnected networkinterconnected network

Enterprise Networking and Internetworking

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The New Information Technology (IT) Infrastructure

Figure 9-1


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Models of Connectivity for NetworksModels of Connectivity for Networks

• Transmission Control Transmission Control Protocol/Internet Protocol (Protocol/Internet Protocol (TCP/IPTCP/IP))

• Open Systems Interconnect (OSI)Open Systems Interconnect (OSI)

Standards and Connectivity for Digital Integration


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(TCP/IP) Reference Model

Figure 9-2


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Client/Server Computing on the Internet

Figure 9-3

THE INTERNET: INFORMATION TECHNOLOGY (IT) INFRASTRUCTURE FOR THE DIGITAL FIRM

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Electronic Mail (E-Mail)Electronic Mail (E-Mail)

• Connects people worldwide Connects people worldwide

• Creates productivity gainCreates productivity gain

Usenet NewsgroupsUsenet Newsgroups

• On-line discussion groups using electronic On-line discussion groups using electronic bulletin boardsbulletin boards

Internet Tools for Communication


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Analysis of an Internet Address

Figure 9-4


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LISTSERVLISTSERV

• E-mail broadcast from mailing list E-mail broadcast from mailing list serversservers

ChattingChatting• Live, interactive conversations over Live, interactive conversations over

public networkpublic network



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Instant messagingInstant messaging• Service that allows participants to Service that allows participants to

create their own private chat channelscreate their own private chat channels

Internet telephonyInternet telephony• Two-way voice transmission over the Two-way voice transmission over the

InternetInternet



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Figure 9-5

GATEWAY

SERVERS

GATEWAY

How are you?

( )A B C

How are you?

( )A B C

Fine, thank you!

( )X Y ZFine, thank you!

( )X Y Z

A B C

X

A

Y

B

Z

C

B C A

Y Z X X Y Z


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TelnetTelnet• Allows users to log on to one Allows users to log on to one

computer system while working on computer system while working on anotheranother

File Transfer Protocol (FTP)File Transfer Protocol (FTP)• Tool for retrieving and transferring Tool for retrieving and transferring

files from a remote computerfiles from a remote computer



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Internet2Internet2 and Next Generation Networks and Next Generation Networks

• Research networks with Research networks with new protocolsnew protocols and and transmission speedstransmission speeds

• Provide infrastructures for supporting Provide infrastructures for supporting high high bandwidthbandwidth Internet applications Internet applications

Next Generation Networks and Internet 2

THE INTERNET: INFORMATION TECHNOLOGY (IT) INFRASTRUCTUREFOR THE DIGITAL FIRM

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FirewallFirewall

• Hardware or software placed between an Hardware or software placed between an organization’s internal network and organization’s internal network and external network external network

• Prevents outsiders from invading private Prevents outsiders from invading private networksnetworks

ExtranetsExtranets

• Private intranets extended to authorized Private intranets extended to authorized users outside company users outside company

Intranets and Extranets

THE WORLD WIDE WEB

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Model of an Extranet

Figure 9-6

THE WORLD WIDE WEB

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• Web-based applications Web-based applications

• Enables users to access digital information Enables users to access digital information from the Internet from the Internet

• Wireless Web Standards:Wireless Web Standards:– Wireless Application Protocol (WAP)– WML (Wireless Markup Language)– Microbrowser– I-mode– M-Commerce Challenges– Voice portals

The Wireless Web

THE WORLD WIDE WEB

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Figure 9-7

THE WORLD WIDE WEB

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WAP Versus I-Mode

Figure 9-8

THE WORLD WIDE WEB

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• Keyboards and screens of cell phones tiny Keyboards and screens of cell phones tiny and awkward to useand awkward to use

• Very slow data transfer speeds Very slow data transfer speeds

• Minimal memory and limited power Minimal memory and limited power supplies in Internet-enabled phones supplies in Internet-enabled phones

• Web content primarily in text with very little Web content primarily in text with very little graphicsgraphics

• Incompatible technologiesIncompatible technologies

M-Commerce Challenges

THE WORLD WIDE WEB

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MANAGEMENT ISSUES AND DECISIONS

• Loss of management controlLoss of management control

• Connectivity and application integration Connectivity and application integration challengeschallenges

• Organizational change requirementsOrganizational change requirements

• Hidden costs of enterprise computingHidden costs of enterprise computing

• Scalability, reliability, and securityScalability, reliability, and securitydowntimedowntime

The Challenge of Managing the New Information Technology Infrastructure

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THE INTERNET AND THETHE INTERNET AND THE

NEW INFORMATIONNEW INFORMATION

TECHNOLOGY TECHNOLOGY

INFRASTRUCTUREINFRASTRUCTURE

1 THE INTERNET AND THE NEW INFORMATION NEW INFORMATIONTECHNOLOGYINFRASTRUCTURE.

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