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Chapter 6

Telecommunications,, thethe ,Internet, andand WirelessWireless TechnologyTechnology

6.1 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and

STUDENT OBJECTIVES

• Describe the features of telecommunications networks and identify key networking . • Evaluate alternative transmission media, types of networks, and network services. • Demonstrate how the Internet and Internet technology work and how they support and e-business.

6.2 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

STUDENT OBJECTIVES (Continued)

• Identify and describe the principal technologies and standards for wireless networking, communication, and .

• Assess the business value of wireless technology and important wireless applications in business.

6.3 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Dartmouth: An Old College Becomes a New Networking Innovator

• Problem: High networking costs, maintaining a high- quality learning environment while embracing new technology and the opportunities it provides. • Solutions: Deploy IP and Wi-Fi networks to combine voice, , and video on a single backbone, establishing campus-wide mobile access and high- speed data and voice services. • Replacing the outdated separate networks reduced costs and increased the services available. • Demonstrates IT’s role in delivering information services that enhance a learning environment. • Illustrates digital technology’s role in creating new opportunities.

6.4 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Dartmouth: An Old College Becomes a New Networking Innovator

Interactive Session: Dartmouth College

• Think about the networking infrastructure of your campus • If your campus has a , what benefits does the network provide to the students, faculty, and staff? • If your campus does not have wireless access, what benefits do you imagine such a network would provide? • What problems do you think might come along with deploying a wireless network on a college campus?

6.5 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Telecommunications and Networking in Today’s Business World

Networking and Communication Trends

• networks vs. networks • Single, digital networks and Internet-based standards • Telecommunications providers •

6.6 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Telecommunications and Networking in Today’s Business World

What Is a ?

• Two or more connected • Network interface card (NIC) • Network operating system (NOS) • Hubs, switches, and routers • Corporate-wide networks

6.7 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Telecommunications and Networking in Today’s Business World

Components of a Simple Computer Network

Illustrated here is a very simple computer network, consisting of computers, a network operating system residing on a dedicated computer, cabling (wiring) connecting the devices, network interface cards (NIC), switches, and a . Figure 6-1

6.8 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Telecommunications and Networking in Today’s Business World

Key Digital Networking Technologies

• /server computing • • TCP/IP and connectivity • Protocols govern transmission of information between two points • Worldwide standard is TCP/IP • Four-layered Department of Defense reference model for TCP/IP includes , , , and network interface layer

6.9 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Telecommunications and Networking in Today’s Business World

The Transmission Control Protocol/ (TCP/IP) Reference Model

This figure illustrates the four layers of the TCP/IP reference model for . Figure 6-4

6.10 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Communications Networks

Physical Transmission Media

• Twisted wire () • • Fiber and optical networks • Dense wavelength division (DWDM) • Wireless transmission media and devices • • • Cellular • Transmission speed (hertz, )

6.11 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Communications Networks

Types of Networks

• Local-area networks (LANs) • Campus-area networks (CANs) • Peer-to-peer • Topologies: star, bus, ring • Metropolitan and wide-area networks • Wide-area networks (WANs) • Metropolitan-area networks (MANs)

6.12 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

Communications Networks

Broadband Network Services and Technologies • Frame relay • Asynchronous Transfer Mode (ATM) • Digital Network (ISDN) • (DSL) • Cable Internet connections • T lines

6.13 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

• What is the Internet? • Internet Addressing and Architecture

• The System • Hierarchical structure • Top-level domains • Internet Architecture and

• No formal management: IAB, ICANN, W3C • The Future Internet: IPv6 and

6.14 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

The

The Domain Name System is a hierarchical system with a root domain, top-level domains, second-level domains, and computers at the third level. Figure 6-8

6.15 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

Internet Services • E- • newsgroups • LISTSERVs • Chatting and • Protocol (FTP) •

6.16 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

Interactive Session: Internet Services • Name specific examples of each of the Internet services that were mentioned previously • Discuss ways in which each of these services may be used to the benefit of a business • Located Web pages that illustrate each of these services in the context of business use

6.17 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

Client/Server Computing on the Internet

Client computers running and other software can access an array of services on servers over the Internet. These services may all run on a single server or on multiple specialized servers. Figure 6-10

6.18 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

The World Wide Web • • Hypertext Transfer Protocol (HTTP) • Uniform resource locators (URLs) • Web servers • Searching for information on the Web • Search engines • Intelligent agent shopping bots • RSS

6.19 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

Intranets and Extranets • • Use existing network infrastructure with Internet connectivity standards software developed for the Web • Create networked applications that can run on many types of computers • Protected by firewalls • Extranets • Allow authorized vendors and customers access to an internal • Used for • Also subject to protection

6.20 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

Technologies and Tools for Communication and E-Business • E-mail, chat, instant messaging, and electronic discussions • Groupware and electronic conferencing • Internet • Virtual private networks

6.21 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Internet

Monitoring Employees on Networks: Unethical or Good Business? • Read the Focus on People and then discuss the following questions: • What problems arise from giving employees access to e-mail and the Internet during working hours? • Should managers monitor employee e-mail and Internet usage? • Why or why not? • Describe an effective e-mail and Web use policy for a company.

6.22 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Wireless

• Wireless devices (PDAs, BlackBerry, smart phones) • Cellular systems • standards and generations (GSM, CDMA) • Cellular generations (SMS, , 2.) • Mobile wireless standards for Web access (WAP, I-mode) • Wireless computer networks and Internet access • (PANs) • Wi-Fi (access points) • Wi-Fi and wireless Internet access (hotspots) • WiMax • Broadband cellular wireless (EV-DO)

6.23 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Wireless Revolution

• RFID and wireless networks • frequency identification (RFID) • Powerful technology for tracking goods in a using radio signals • Reduction in cost of RFID tags now making the technology viable for many firms • Wireless sensor networks • Can be used to monitor building security, detect hazardous substances in the air, or monitor environmental changes, traffic, or military activity • Require low-power, long-lasting batteries and ability to endure in the field without maintenance

6.24 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Wireless Revolution

How RFID Works

RFID uses low-powered radio to read data stored in a tag at distances ranging from 1 inch to 100 feet. The reader captures the data from the tag and sends them over a network to a host computer for processing. Figure 6-18

6.25 © 2007 by Prentice Hall Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology

The Wireless Revolution

TransAlta: New Power from Wireless Technology

• Read the Focus on Technology and then discuss the following questions: • What problems and challenges did TransAlta face? • How did these problems affect its business? • How did wireless technology help the company solve these problems? • What other solutions might the company have tried? • Did TransAlta choose the best solution? Explain your answer.

6.26 © 2007 by Prentice Hall