Chapter 8 Questions
A wildlife management agency tags wolves to track their migration. How are they using the Internet of Things?
environmental monitoring
When compared, Wi-Fi Direct offers ________ connectivity than/to Bluetooth.
greater
A(n) __________ in the number of people accessing the Internet has led to a(n) _____________ in the number of IP addresses, which ________ led to the development of the IoT.
increase, increase, has
Compare smart cards and digital wallets.
Both can be multipurpose, but the smart card stores information on one card containing a chip, while a digital wallet utilizes an app on a desktop or smartphone.
What is the difference between Super Wi-Fi and WiMAX?
Both can create long-distance wireless Internet signals; however, Super Wi-Fi is a medium-range wireless network, while WiMAX is a wide-area wireless network.
What will MOST LIKELY happen if a network of wireless sensors receives much more data than it can transmit efficiently over the current bandwidth?
Operators will place more sensors only where they are required.
Janelle has purchased cell phones for the management staff of her busy, urban company. She chose technology that is designed to handle network congestion when too many people in one area try to access an LTE network. What kind of technology did she choose?
XLTE
The tag on the scarf you are purchasing has been torn; the cashier finds an identical scarf so that he can scan that code. The cashier is not concerned that he is not scanning the scarf you are actually purchasing. The tag probably uses a
bar code
Brian is able to turn his house lights on and off from his mobile device. This is an example of a way a wireless sensor
controls a physical system.
LTE is approximately 10 times _______ than 3G.
faster
If Mountain Outfitters switches from QR codes to UPC codes for tracking inventory, what can it expect?
larger tags that store more data
The Terrell Corporation is able to use the IoT to track its food products from the farm to the grocery store. This is an example of
supply chain management
RFID
technology involves placing tags with antennas and computer chips on goods in order to track their movements.
Which of the following is MOST LIKELY to happen if Monika dials her boyfriend's number on her cell phone and hits the "call" button?
The signal will be transmitted to the local antenna and passed from cell to cell until it reaches its destination.
How do wireless sensors work?
They collect data from many points over an extended space.
Which of the following is an example of the IoT?
When the local animal shelter processes a dog picked up by animal control, the employees scan the microchip implanted in the dog to locate the owner.
You have been asked to give a presentation on current and emerging technologies for wide-area wireless networks to potential investors in a telecommunications fund. Which of the following points would be BEST to include in your presentation?
4G networks currently in use reach up to 100 Mbps for commuters and 1 Gbps for pedestrians. 5G networks are expected to be deployed by 2020 and are to be more intelligent networks. WiMAX, to help rural areas, will have a range of 31 miles and data transfer rates of up to 75 Mbps.
Fred provides part-time accounting services from his home office. He primarily uses the Internet for e-mail and for a connection to his wireless printer. What IEEE standard would be BEST suited to his needs at the lowest cost?
802.11ad supports a "wireless office".
What happens if one sensor in a wireless sensor system fails to pick up data?
Another sensor picks up its data.
What is the relationship between credit card fees and the growth of micro-payments?
Consumers use micro-payments to avoid paying credit card fees on small purchases..
You are a communications technology specialist advising a military contractor that requires GPS technology for its employees in the field even in extremely remote areas where lives could depend on it. The company is also interested in setting up temporary headquarters with wireless technology where no field employee is able to remotely access confidential information but can communicate to the headquarters in the U.S. The company is also interested in ensuring that its employees do not copy and share confidential information using their cell phones or other wireless technology. It wants to provide radio for entertainment purposes for its employees in the field and at temporary headquarters. What kinds of technology do you recommend?
GPS can track one's position within 6 feet anywhere on the earth and is therefore reliable even in the most remote locations; radio transmissions are not a good option because they can be intercepted by someone with similar equipment. Microwave transmissions do not cover a large area and must have line-of-sight transmission which makes long-distance communication impractical. Satellite technology also requires line-of-sight transmission, but it is the best option because it offers a large footprint that allows for long-distance communication. Satellite transmissions are also sent to many receivers at one time which facilitates long-distance communication. The company should consider jamming technology to ensure that employees are not able to use camera phones or other wireless technology to even inadvertently transmit confidential information.
Compare microwave and satellite transmission systems.
Microwave transmissions transmit data via line of sight, and satellites do not; however, they have equal transmission footprints.
Matrix Communications operates a wireless transmission system in several cities in the United States and Europe. Users of its television and Internet service often complain of interruptions during severe weather. What type of system is MOST susceptible to this problem, and why? What is a better alternative?
The company is using a microwave transmission system. Microwave transmissions require that the transmitter and receiver be in view of each other and, thus, cannot be spaced more than 30 miles apart. They are also susceptible to environmental interference. Microwave systems are being replaced by satellite transmission systems because they have a larger footprint and are less susceptible to interference. The company should weigh cost against performance when considering a satellite with a high, medium, or low orbit.
Sophie waves her employee ID badge in front of a card reader to unlock the employee entrance to the library. What kind of wireless connection is she probably using?
UWB
Zoe is a caregiver in a large skilled nursing community. She has an app on her cell phone and laptop that allows her to track patients with dementia who are wearing a badge. If a patient wanders out of bounds, she is able to find the location of the nearest caregiver who is also wearing a badge. What kind of technology is Zoe using?
UWB
You are given an oral exam on medium-range wireless networks where the professor has asked you to give an account of the types of networks and features of each. Which of the following represents the BEST answer to your examiner?
Wi-Fi Direct enables peer-to-peer communications; MiFi is a portable, permanent Wi-Fi hotspot; and Super Wi-Fi uses whitespace between broadcast TV channels.
You have been asked to give a presentation on the current and future state of wireless technology in rural areas with few mobile hotspots. What type of wide-reach wireless technology is in development and what is currently available that you should be sure to include?
WiMAX has a wireless access range of up to 31 miles, compared to 300 feet for Wi-Fi. WiMAX can provide long-distance broadband wireless access to rural areas and other locations that are not currently being served.
__________ has a wireless access range of up to 31 miles compared with 300 feet for ______________
WiMax ; Wi-Fi
Lucy often checks her email at the local coffee shop in the morning and then logs onto her online class from the university library. Internet is free to customers in the coffee shop and to patrons of the library, but Lucy has to log on to separate accounts at each location. She is probably using
a hotspot
MiFi offers greater ______________ when compared with Wi-Fi Direct.
portability
Sally manages a small shopping center with a cafe, a coffee shop, an art gallery, and a boutique. The center is marketed as a high tech shopping experience. Sally wants to make high quality Internet accessible to customers and business owners at all times. Which Internet network should she install, and why?
802.11 ad because it supports wireless bandwidth up to 7 Gbps and is targeted to the "wireless office"
Megan has a wireless network set up in her office. Because of the nature of the work, the office requires a very high bandwidth and supports dozens of devices. What IEEE standard is her Wi-Fi MOST LIKELY to be?
802.11ad
Bob Thrift lives in an affluent neighborhood and is looking to redo the Internet in his house. Bob has a wife, three teenage daughters, and a video-game-playing son who all need on-demand video and Internet access on their tablets, phones, laptops, and gaming consoles for both work and school. If Bob hired you to install his home Internet network, which would you recommend, and why?
An 802.11ac wireless network because it supports bandwidth of up to 1.3 Gbps and is designed for the wireless, multimedia home
Marina would like to watch movies streamed from her laptop onto her SmartTV. Which of the following wireless networking technologies would be BEST for this application?
Bluetooth
Dark Zero is trying to provide free Internet to citizens of an oppressed city that censors the Internet greatly. This group has hired a consultant to advise them of the wireless transmission channel they should use to broadcast that signal. Though poorly-funded, this group is effective during civil strife situations and requires communications to underground groups who must remain well-hidden. The consultant suggested that they use microwave transmission because of its high bandwidth and because it is inexpensive. He also advised against using satellite communications due to its expensive nature. Would you agree with the consultant? Why or why not?
No. Microwave transmission requires unobstructed line of sight and is susceptible to interference. Radio would be a better choice because it is inexpensive and penetrates walls.
________________ RFID tags depend entirely on readers for their power; ________________ RFID tags are powered by an internal battery.
Passive, Active
Ranger Environmental Services collects data from roadside counters then transmits the data through a wireless sensor system. What will the result be when the data reaches a central computer?
The data will be stored and analyzed.
A large retailer is considering whether to implement a mobile phone app that would allow users to locate the store nearest them and check if items are in stock. What are some of the factors in favor of implementing the app?
The prices of wireless devices are declining and will continue to decline. Wi-Fi, 4G cellular technology, and WiMAX all provide the necessary bandwidth to conduct m-commerce. Mobile devices are becoming more available throughout the world.
A sales engineer for a startup mobile app company is speaking to the Chamber of Commerce on mobile commerce applications. In describing telemetry applications, he says doctors can monitor patients and control medical equipment from a distance and allow technicians to identify maintenance problems and equipment. He also states that telemetry applications leverage a lean, or stripped-down, version of a Web site to keep data transfers to a minimum. Would you agree with his statements? Why or why not?
The sales engineer is correct in what telemetry equipment can do in a medical and maintenance setting. However, telemetry is the wireless transmission and receipt of data gathered from remote sensors; it does not leverage stripped-down Web sites.
What is the relationship between Wi-Fi and Wi-Fi Direct?
Until 2010, Wi-Fi could only operate if a hotspot had a wireless antenna. Wi-Fi Direct allows users to transfer content among devices without having to rely on a wireless antenna.
When Karla goes to the grocery store, she likes to use the self-check-out line. She loves to scan the
codes on her items. If she doesn't get the line-of-sight right the first time or the code is damaged, she has to request help from an associate.
: Similar to QR codes, passive RFID tags _________ have batteries.
don't
Jennifer is working at her local library accessing the Internet through a wireless access point intended only for the patrons within the library. Which of the following is she likely using?
hotspot
Seamus is a driver of a door-to-door transportation service for adults with disabilities. His company uses an app that alerts him of pick-ups and sends him maps and other information for each location. This is an example of a(n)
intra-business application.
wireless sensor
is/are the underlying technology of the IoT.
Luna receives information on her cell phone that is specific to her location. This is an example of
location-based advertising.
Joe's phone has just alerted him that his usual route home has been closed due to a multi-car accident, and it shows him a convenient detour around the backup. This is an example of
location-based services.
Peter uses QR codes to track inventory at his music store. If he switches to RFID tags for all inventory, he might want to consider using ____________ RFID tags for his less expensive items and ______________ RFID tags for his more expensive items such as high-end musical instruments.
passive, active
When compared, QR codes are _______ than UPC codes and can store ______________ information.
smaller, more
The Industrial Internet and machine-to-machine communication are alternate names for
the Internet of Things.
Rachel has just installed a state-of-the-art thermostat in her house that is able to adjust the temperature and the humidity levels in the house. This is an example of
the IoT
You are speaking to a group of small-and middle-sized bank executives on the emergence and future of banking by phone, along with other mobile devices. In creating an outline for the executives, you want to list some factors for the rapid development of mobile commerce. Which of the following would be MOST appropriate to include as factors in your outline?
Declining prices of wireless devices, bandwidth improvement for mobile commerce, and widespread availability of mobile devices
Rosie runs a small business for which she and three other employees travel throughout the region to provide team-building training. They often file reports from the field, so she has provided them all with phones that can access a broadband connection at any location that offers 3G cellular network coverage. What kind of technology is Rosie using?
MiFi
Becky has an app on her cell phone that allows her to wave her phone over a payment terminal at the grocery store, and the payment for her groceries will automatically be deducted from her bank account. Which of the following is she using?
NFC
Leonard is presenting technology options to the local animal shelter. He suggests NFC as a way of providing staff with badges for entry into secure areas and a Bluetooth cell phone app as a way of tracking animals that are lost. The shelter occasionally has to cope with emergencies because of animal illness or behavior, and it needs to locate staff immediately within the large shelter complex. Leonard suggests UWB as a means of doing this. Evaluate his suggestions.
NFC has the smallest range of communication and would be good for devices such as entry badges that are close to the device with which they are communicating. Bluetooth, however, is a short-range wireless technology that operates within 100 meters of the device with which it is communicating; it would not be appropriate for tracking lost animals. UWB is commonly used for obtaining real-time locations.
You have been asked to give a talk to a class of 6th graders on the types of emerging medium- and wide-range wireless networks they can expect to be widely available by the time they graduate from high school. Which types of technology should you include in order to present the most thorough information?
Super Wi-Fi uses the lower-frequency "white spaces" between broadcast TV channels. These frequencies enable the signal to travel further and penetrate walls better than normal Wi-Fi frequencies. 5G networks are predicted to be faster and more intelligent than previous generations of cellular networks with applications in wearable technology. WiMAX can provide long-distance broadband wireless access to rural areas and other locations that are not currently being served.
Compare ubiquity and instant connectivity.
They are both value-added attributes created by m-commerce. Ubiquity means that consumers can provide information and communication, regardless of a user's location. Instant connectivity means that users can access mobile devices without booting up or placing a call via modem.
Compare customization and localization.
They are both value-added attributes created by mobility and broad reach.
