A.I.S. Class 25: Outline Learning Objectives for Chapter 4 - - PowerPoint PPT Presentation

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A.I.S. Class 25: Outline Learning Objectives for Chapter 4 Telecommunications Networks Group Work for Chapter 4 Group Project Stage 6 Dr. Peter R Gillett December 4, 2006 1 Learning Objectives for Chapter 4 After studying

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December 4, 2006

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A.I.S. Class 25: Outline

Learning Objectives for Chapter 4 Telecommunications Networks Group Work for Chapter 4 Group Project Stage 6

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Learning Objectives for Chapter 4

After studying this chapter you should be able

to:

identify the five components of a telecommunications

network,

distinguish between terminals and workstations, explain the various types of transmission links, including

physical and "through the air" links,

differentiate between alternative transmission methods

such as analog and digital transmission, circuit switching and packet switching,

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Learning Objectives for Chapter 4

describe in general terms the functioning of line sharing

devices and switches,

explain the role of network architecture and standards, explain the OSI telecommunications model, distinguish between local area networks and wide area

networks,

describe alternative computer network configurations

including ring, star, and bus networks,

understand the various types of wide area networks, including

the options for centralized data processing networks and distributed data processing networks,

explain the concept of a client/server system,

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Learning Objectives for Chapter 4

understand the architecture and functioning of the

Internet,

distinguish between the Internet and Intranets, describe the operation of electronic data interchange

arrangements between organizations,

explain the concept of e-business and its emerging

importance in the global economy.

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Telecommunications

Terminals and workstations Transmission links Transmission methods Line sharing and switching Architecture and standards

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Terminals and Workstations

Dumb terminals Intelligent workstations Network interface cards Net PCs

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Transmission Links

Twisted-pair cables Coaxial cables Fiber optic cables Infra-red transmission Microwaves Satellite transmission

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Transmission Methods

Analog Digital Circuit switching Packet switching Asynchronous Synchronous

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Line Sharing and Switching

Multiplexers (MUX)

time frequency

Front-end processors Bridges Routers Brouters Gateways

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Architecture and Standards

ISO’s OSI model

physical link network transport session presentation application

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Communication Protocols

Full Duplex

(Duplex)

Half Duplex

(Simplex)

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Networks

Local area networks Network topologies

bus token ring star hybrid

Novell NetWare Windows 2003 Server

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Networks

Wide area networks Modems ISDN DSL Cable Modems

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Networks

Dedicated connections

T1 T3 etc.

Lines

switched WATS leased

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Networks

Centralized data processing

point-to-point multidrop multiplexed

Distributed data processing Client-server systems

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Networks

Internet

Telnet FTP Usenet (News Groups) E-mail WWW IRC MUD

Intranets Extranets

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Networks

Electronic Data Interchange (EDI) Electronic Funds Transfer (EFT, EFTPOS) Value Added Network (VAN) ASC.X12 EDI via Internet

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Electronic Commerce

Web presence Business to consumer (B2C)

electronic retailing, banking, trading

Business to business (B2B)

e-procurement

Business to government (B2G) Business to employees (B2E) Individual to government

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Electronic Commerce

Issues

payment

EFT credit cards electronic wallets PayPal e-cash

security privacy authentication and non-repudiation

WebTrust

jurisdiction and legal issues

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XML & XBRL

SGML

HTML - format XML - content

XBRL – financial community

XBRL

Fast, accurate searches Drill-down Less data re-entry User choice for disclosure

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XML Documents

Hierarchical Self-describing Directly usable over the Internet Do not replace HTML Standards promulgated by W3C Convert to HTML, spreadsheet, etc. via XSLT XML Schema – a new standard for defining

consistent structure

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XBRL

XML-based taxonomy Common business semantics Variable output format Currently:

Financial reporting taxonomies General ledger taxonomies

Promulgated by XBRL International, created by

AICPA, www.XBRL.org

Specification 2.1 issued December 2003

(revised November 2004, 2005)

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Group Work for Chapter 4

Discussion Questions Problems 1 & 2

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Group Project Stage 6

Presentation