6.1 © 2007 by prentice hall 6 chapter telecommunications, the internet, and wireless technology

6.1 © 2007 by Prentice Hall

6Chapter

Telecommunications, the Telecommunications, the Internet, and Wireless Internet, and Wireless

TechnologyTechnology

Telecommunications, the Telecommunications, the Internet, and Wireless Internet, and Wireless

TechnologyTechnology


STUDENT OBJECTIVES

Essentials of Business Information SystemsEssentials of Business Information SystemsChapter 6 Telecommunications, the Internet, and Chapter 6 Telecommunications, the Internet, and

Wireless TechnologyWireless Technology

• Describe the features of telecommunications networks and identify key networking technologies.

• Evaluate alternative transmission media, types of networks, and network services.

• Demonstrate how the Internet and Internet technology work and how they support communication and e-business.


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

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

STUDENT OBJECTIVES (Continued)




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, data, 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• Replacing the outdated separate networks reduced costs and increased the services available.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.




• Think about the networking infrastructure of your campus

• If your campus has a wireless network, 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?

Interactive Session: Dartmouth CollegeInteractive Session: Dartmouth College

Dartmouth: An Old College Becomes a New Networking Innovator




Telecommunications and Networking in Today’s Business World

• Telephone networks vs. computer networks

• Single, digital networks and Internet-based standards

• Telecommunications providers

• Broadband



Networking and Communication TrendsNetworking and Communication Trends


What Is a Computer Network?What Is a Computer Network?




• Two or more connected computers

• Network interface card (NIC)

• Network operating system (NOS)

• Hubs, switches, and routers

• Corporate-wide networks


Components of a Simple Computer NetworkComponents of a Simple Computer Network




Figure 6-1

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


Key Digital Networking TechnologiesKey Digital Networking Technologies




• Client/server computing

• Packet switching

• 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 application layer, transport layer, Internet layer, and network interface layer


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




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


• Twisted wire (modems)

• Coaxial cable

• Fiber optics and optical networks

• Dense wavelength division multiplexing (DWDM)

• Wireless transmission media and devices• Microwave

• Satellites

• Cellular telephones

• Transmission speed (hertz, bandwidth)

Physical Transmission MediaPhysical Transmission Media

Communications Networks




Types of NetworksTypes 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)





Broadband Network Services and TechnologiesBroadband Network Services and Technologies

• Frame relay

• Asynchronous Transfer Mode (ATM)

• Integrated Services Digital Network (ISDN)

• Digital subscriber line (DSL)

• Cable Internet connections

• T lines





• What is the Internet?

• Internet Addressing and Architecture

• The Domain Name System

• Hierarchical structure

• Top-level domains

• Internet Architecture and Governance

• No formal management: IAB, ICANN, W3C

• The Future Internet: IPv6 and Internet2



The Internet


The Domain Name SystemThe Domain Name System



Figure 6-8

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

The Internet


Internet ServicesInternet Services



The Internet

• E-mail

• Usenet newsgroups

• LISTSERVs

• Chatting and instant messaging

• File Transfer Protocol (FTP)

• World Wide Web


Interactive Session: Internet ServicesInteractive Session: Internet Services



The Internet

• 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


Client/Server Computing on the InternetClient/Server Computing on the Internet



Figure 6-10

Client computers running Web browser 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.

The Internet




The Internet

The World Wide WebThe World Wide Web

• Hypertext• Hypertext Transfer Protocol (HTTP)

• Uniform resource locators (URLs)

• Web servers

• Searching for information on the Web• Search engines

• Intelligent agent shopping bots

• RSS


Intranets and ExtranetsIntranets and Extranets



The Internet

• Intranets• 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 intranet

• Used for collaboration

• Also subject to firewall protection


Technologies and Tools for Communication and E-BusinessTechnologies and Tools for Communication and E-Business



The Internet

• E-mail, chat, instant messaging, and electronic discussions

• Groupware and electronic conferencing

• Internet telephony

• Virtual private networks


• 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.

Monitoring Employees on Networks: Unethical or Monitoring Employees on Networks: Unethical or Good Business?Good Business?



The Internet


• Wireless devices (PDAs, BlackBerry, smart phones)

• Cellular systems• Cellular network standards and generations (GSM, CDMA)

• Cellular generations (SMS, 3G, 2.5G)

• Mobile wireless standards for Web access (WAP, I-mode)

• Wireless computer networks and Internet access• Bluetooth (PANs)

• Wi-Fi (access points)

• Wi-Fi and wireless Internet access (hotspots)

• WiMax

• Broadband cellular wireless (EV-DO)



The Wireless Revolution


• RFID and wireless sensor networks

• Radio frequency identification (RFID)

• Powerful technology for tracking goods in a supply chain 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





How RFID WorksHow RFID Works



Figure 6-18

RFID uses low-powered radio transmitters 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.



• 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.

TransAlta: New Power from Wireless TechnologyTransAlta: New Power from Wireless Technology




6.1 © 2007 by prentice hall 6 chapter telecommunications, the internet, and wireless technology

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