Telecommunications, the Internet, and Wireless Technology

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6
Chapter
Telecommunications, the Internet, and Wireless
Technology
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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
STUDENT OBJECTIVES

• 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.

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

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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, 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• Replacing the outdated separate networks reduced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 ITs role in delivering information
  services that enhance a learning environment.
• Illustrates digital technologys role in creating
  new opportunities.

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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 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?
  

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
Telecommunications and Networking in Todays
Business World
Networking and Communication Trends

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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
Telecommunications and Networking in Todays
Business World
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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
Telecommunications and Networking in Todays
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 server
computer, cabling (wiring) connecting the
devices, network interface cards (NIC), switches,
and a router.
Figure 6-1
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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
Telecommunications and Networking in Todays
Business World
Key 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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
Telecommunications and Networking in Todays
Business World
The Transmission Control Protocol/Internet
Protocol (TCP/IP) Reference Model
This figure illustrates the four layers of the
TCP/IP reference model for communications.
Figure 6-4
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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
Communications Networks
Physical Transmission Media

• 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)

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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)

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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)
• Integrated Services Digital Network (ISDN)
• Digital subscriber line (DSL)
• Cable Internet connections
• T lines

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Internet

• 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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Internet
The Domain Name System
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.
Figure 6-8
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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Internet
Internet Services

• E-mail
• Usenet newsgroups
• LISTSERVs
• Chatting and instant messaging
• File Transfer Protocol (FTP)
• World Wide Web

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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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Internet
Client/Server Computing on the Internet
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.
Figure 6-10
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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Internet
The 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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Internet
Intranets and Extranets

• 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

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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 telephony
• Virtual private networks

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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.

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Wireless Revolution

• 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)

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
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

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Essentials of Business Information
Systems Chapter 6 Telecommunications, the
Internet, and Wireless Technology
The Wireless Revolution
How RFID Works
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.
Figure 6-18
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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.