Telecommunications, the Internet, and Wireless Technology Chapter 6 Telecommunications, the Internet, and Wireless Technology

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.

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.

Illustrates digital technology’s role in creating new opportunities. 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 Replacing the outdated separate networks reduced costs and increased the services available.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 IT’s role in delivering information services that enhance a learning environment. Illustrates digital technology’s role in creating new opportunities.

Interactive Session: Dartmouth College 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?

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

What Is a Computer Network? Essentials of Business Information Systems Chapter 6 Telecommunications, the Internet, and Wireless Technology Telecommunications and Networking in Today’s 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

Components of a Simple Computer Network 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 server computer, cabling (wiring) connecting the devices, network interface cards (NIC), switches, and a router. Figure 6-1

Key Digital Networking Technologies 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 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

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/Internet Protocol (TCP/IP) Reference Model This figure illustrates the four layers of the TCP/IP reference model for communications. Figure 6-4

Physical Transmission Media 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)

Local-area networks (LANs) 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)

Broadband Network Services and Technologies 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

Internet Addressing and Architecture 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

The Domain Name System 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

Chatting and instant messaging File Transfer Protocol (FTP) 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

Interactive Session: Internet Services 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

Client/Server Computing on the Internet 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

Searching for information on the Web 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

Intranets and Extranets 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

Technologies and Tools for Communication and E-Business 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

Monitoring Employees on Networks: Unethical or Good Business? 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.

Wireless devices (PDAs, BlackBerry, smart phones) Cellular systems 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)

RFID and wireless sensor networks 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

How RFID Works Essentials of Business Information Systems Figure 6-18 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

TransAlta: New Power from Wireless Technology 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.