Chapter 10: Wireless, mobile computing, and mobile commerce. In this chapter, the learning objectives are: Identify advantages and disadvantages of each of the four main types of wireless transmission media; explain how businesses can use short-range, medium-range, and long-range wireless networks; provide a specific example of how each of the five major m-commerce applications can benefit a business. | CHAPTER 10 Wireless, Mobile Computing and Mobile Commerce CHAPTER OUTLINE Wireless Technologies Wireless Computer Networks and Internet Access Mobile Computing and Mobile Commerce Pervasive Computing Wireless Security LEARNING OBJECTIVES Identify advantages and disadvantages of each of the four main types of wireless transmission media. Explain how businesses can use short-range, medium-range, and long-range wireless networks, respectively. Provide a specific example of how each of the five major m-commerce applications can benefit a business. Describe technologies that underlie pervasive computing, providing examples of how businesses can utilize each one. Explain how the four major threats to wireless networks can damage a business Wireless Technologies Wireless Transmission Media Microwave Advantages of Microware High bandwidth Relatively inexpensive Disadvantages of Microwave Must have unobstructed line of sight Susceptible to . | CHAPTER 10 Wireless, Mobile Computing and Mobile Commerce CHAPTER OUTLINE Wireless Technologies Wireless Computer Networks and Internet Access Mobile Computing and Mobile Commerce Pervasive Computing Wireless Security LEARNING OBJECTIVES Identify advantages and disadvantages of each of the four main types of wireless transmission media. Explain how businesses can use short-range, medium-range, and long-range wireless networks, respectively. Provide a specific example of how each of the five major m-commerce applications can benefit a business. Describe technologies that underlie pervasive computing, providing examples of how businesses can utilize each one. Explain how the four major threats to wireless networks can damage a business Wireless Technologies Wireless Transmission Media Microwave Advantages of Microware High bandwidth Relatively inexpensive Disadvantages of Microwave Must have unobstructed line of sight Susceptible to environmental interference Wireless Transmission Media Satellite Advantages of Satellite High bandwidth Large coverage area Disadvantages of Satellite Expensive Must have unobstructed line of sight Signals experience propagation delay Must use encryption for security Satellites Three Types of Satellites Circling Earth Geostationary-Earth-Orbit (GEO) Medium-Earth-Orbit (MEO) Low-Earth-Orbit (LEO) Footprint Propagation Delay Internet over Satellite (IoS) Satellites: Geostationary-Earth-Orbit (GEO) 22,300 miles above earth Stationary relative to a point on Earth Transmission delay (.25 seconds) Longest orbital life (many years) Few Needed for Global Coverage Used for Television Signals Most Expensive to Build and Launch Satellites: Medium-Earth-Orbit (MEO) 6,434 miles above earth Satellites moves relative to a point on Earth Negligible transmission delay Moderate orbital life (6-12 years) Moderate number needed for global coverage Used for Global Positioning Systems Less Expensive
