Question 1

Which type of satellite has the shortest orbital life?
A) Low-earth-orbit
B) Medium-earth-orbit
C) Geostationary-earth-orbit
D) Polar-earth-orbit

Accepted Answer

Satellites in low-earth-orbit have a shorter orbital life as they are closer to the Earth and experience more atmospheric drag, resulting in more frequent orbit decay and reentry into the Earth's atmosphere. Medium-earth-orbit and geostationary-earth-orbit satellites have longer orbital lifetimes due to higher altitudes and less atmospheric drag. Polar-earth-orbit satellites have varying orbital lifetimes depending on their altitude and mission objectives.

Question 2

Wi-Fi is a wireless standard that enables temporary, short-range connections between mobile devices.

Accepted Answer

Wi-Fi is a wireless networking technology that allows devices to connect to the internet and each other over longer distances, not just for temporary, short-range connections.

Question 3

Mobile applications in financial services include which of the following?
A) Brokerage services
B) Wireless electronic payment systems
C) Micropayments
D) All of these options

Accepted Answer

Mobile applications in financial services include brokerage services, wireless electronic payment systems, and micropayments. Therefore, all of these options are the correct choice.

Question 4

Rogue access points can be set up by employees.

Accepted Answer

Rogue access points can be set up by employees without the knowledge or consent of the organization's IT department, which can pose a security risk to the network.

Question 5

A _____ is a new class of digital communication device that provides an organizer, cell phone, digital camera, access to e-mail, Internet access, and short message service.
A) cell phone
B) pager
C) personal digital assistant
D) smartphone

Accepted Answer

A smartphone is a new class of digital communication device that provides all of these features in one device, making it a versatile and convenient tool for communication and organization.

Question 6

Eavesdropping refers to:
A) locating WANs while driving or walking and using a wireless-enabled computer to intrude into the network.
B) unauthorized users accessing data that are traveling over wireless networks.
C) a person or a device that intentionally or unintentionally interferes with wireless network transmissions.
D) making private wireless communications available to the public.

Accepted Answer

Eavesdropping specifically refers to the act of listening in on or accessing data that is traveling over a wireless network without authorized access. The other choices involve interference or intrusion into wireless networks, but do not necessarily involve accessing data without authorization.

Question 7

Which of the following statements about Google's Project Fi is NOT true?
A) It utilizes approximately 1 million free, open Wi-Fi hotspots that Google has verified as fast and reliable.
B) It is a prepaid phone service that provides users with data services across all existing mobile networks.
C) It encrypts data when a customer uses public Wi-Fi.
D) It allows customers to change the size of their data plans whenever they want.

Accepted Answer

Project Fi is not a prepaid service, rather it is a postpaid service where customers are billed at the end of the month for the data they used.

Question 8

Mobile commerce refers to a real-time, wireless connection between a mobile device and other computing environments.

Accepted Answer

Mobile commerce specifically refers to the buying and selling of goods and services through wireless handheld devices such as smartphones and tablets, not just any real-time, wireless connection between devices.

Question 9

With which type of satellite is there a propagation delay?
A) Low-earth-orbit
B) Medium-earth-orbit
C) Geostationary-earth-orbit
D) Polar-earth-orbit

Accepted Answer

Geostationary-earth-orbit satellites have a propagation delay due to their high altitude of 36,000 km from Earth, resulting in a delay of approximately 250-300 milliseconds for every transmission. This can affect real-time communication and applications where prompt response time is required. Low-earth-orbit, medium-earth-orbit, and polar-earth-orbit satellites have much lower altitudes and, hence, minimal propagation delay.

Question 10

Which of the following is a disadvantage of using a microwave transmission system?
A) Its signals experience propagation delay.
B) It is susceptible to environmental interference.
C) It creates electrical interference problems.
D) It requires the use of encryption for security.

Accepted Answer

Microwave transmission systems are highly susceptible to environmental interference such as weather conditions, trees, and buildings. This interference can cause signal degradation or loss, which can affect the quality of communication.

Question 11

Which of the following best describes the Internet of Things?
A) It refers to a real-time, wireless connection between a mobile device and other computing environments, such as an intranet.
B) It refers to e-commerce transactions that are conducted with a mobile device.
C) It means that virtually every device has processing power with wireless or wired connections to a global network.
D) None of these options

Accepted Answer

The Internet of Things (IoT) refers to the interconnected network of physical devices, vehicles, buildings, and other items that are embedded with sensors, software, and network connectivity, allowing them to send and receive data. This means that virtually every device has processing power with wireless or wired connections to a global network. Option A describes mobile computing, option B specifically refers to mobile e-commerce, and option D is not the correct answer.

Question 12

The major security threats to wireless communications include:
A) rogue access points, telemetry, and WSNs.
B) rogue access points, war driving, and eavesdropping.
C) rogue access points, telemetry, and eavesdropping.
D) rogue access points, WSNs, and RF jamming.

Accepted Answer

Rogue access points refer to unauthorized devices that connect to a wireless network and pose a security threat. War driving involves searching for wireless access points while driving, and eavesdropping refers to intercepting wireless communications. These are the most common security threats to wireless communications. Telemetry and RF jamming are also threats, but they are less frequent. WSNs are usually secure, but they could still be subject to rogue access points.

Question 13

A(n) _____ allows unauthorized entry into a wireless network.
A) lack of encryption
B) rogue access point
C) open node
D) illegal server

Accepted Answer

A rogue access point is a wireless access point that has been installed on a network without the network administrator's knowledge or authorization, allowing unauthorized entry into the network. The other options may also pose security risks, but they do not necessarily directly allow unauthorized access to the network.

Question 14

Which of the following is the most appropriate wireless technology for real-time location of caregivers and mobile equipment in health-care environments?
A) Wi-Fi
B) Microwave
C) Ultra-wideband
D) Infrared

Accepted Answer

Ultra-wideband (UWB) is the most appropriate wireless technology for real-time location tracking in health-care environments because it provides high accuracy and low latency. UWB also has low interference with other wireless signals, making it a reliable option. Wi-Fi and microwave can cause interference with other devices and may have lower accuracy. Infrared is not suitable for real-time tracking as it requires a clear line of sight between the transmitter and receiver.

Question 15

A transmitter with an antenna that connects a mobile device to a wired local area network is called a _____.
A) transceiver
B) hotspot
C) cellular radio
D) wireless access point

Accepted Answer

A wireless access point is a device that allows wireless devices to connect to a wired local area network. It acts as a transmitter with an antenna that broadcasts a wireless signal for devices to connect to. A transceiver is a device that can both transmit and receive signals, but it may not necessarily be used for connecting mobile devices to a network. A hotspot usually refers to a location where wireless internet is available, but it is not a specific device. Cellular radios are used for connecting mobile devices to cellular networks, not local area networks.

Question 16

Microwave transmissions are broadcast, whereas satellite transmissions are point-to-point.

Accepted Answer

Microwave transmissions can be both point-to-point and broadcast, whereas satellite transmissions typically involve broadcasting from a satellite to multiple receivers on the ground, making them inherently capable of both point-to-multipoint and point-to-point communications.

Question 17

Which type of satellite requires the highest number of satellites for global coverage?
A) Low-earth-orbit
B) Medium-earth-orbit
C) Geostationary-earth-orbit
D) Polar-earth-orbit

Accepted Answer

Low-earth-orbit (LEO) satellites require the highest number of satellites for global coverage because they orbit closer to the Earth, covering a smaller area per satellite compared to those in medium-earth-orbit (MEO) or geostationary-earth-orbit (GEO), necessitating a larger constellation to achieve global coverage.

Question 18

Which of the following characteristics distinguishes mobile computing from other forms of computing?
A) Mobile computing offers greater security.
B) Connectivity is slower but more reliable than in other forms of computing.
C) Mobile computing is limited to relatively short SMS messages.
D) Customized information can be sent to individuals as an SMS.

Accepted Answer

The ability to send customized information to individuals as an SMS (text message) is a characteristic unique to mobile computing. While mobile computing may offer some security benefits, this is not a defining characteristic. Connectivity can vary in terms of speed and reliability depending on the specific situation. And while SMS messages may be limited in length, mobile computing is not limited to just SMS messages - other forms of communication such as email and video calls are also possible.

Question 19

Mobile computing has two major characteristics that differentiate it from other forms of computing. What are these two characteristics?
A) Mobility and broad reach
B) Mobility and lack of expense
C) Security and broad reach
D) Security and mobility

Accepted Answer

Mobility allows users to move and access services from anywhere, not tied to a fixed location, while broad reach means these services can be accessed by a large number of users over a wide area, making these the two distinguishing characteristics of mobile computing.

Question 20

Using your cell phone to purchase a Coke from a vending machine is an example of _____.
A) mobile banking
B) wireless wallet
C) micropayment
D) money transfer

Accepted Answer

This is an example of micropayment, as it is a small monetary transaction conducted digitally. Mobile banking, wireless wallet, and money transfer may involve larger sums of money or different types of financial transactions.

Quiz 10: Wireless, Mobile Computing, and Mobile Commerce

Which type of satellite has the shortest orbital life?

Wi-Fi is a wireless standard that enables temporary, short-range connections between mobile devices.

Mobile applications in financial services include which of the following?

Rogue access points can be set up by employees.

A _____ is a new class of digital communication device that provides an organizer, cell phone, digital camera, access to e-mail, Internet access, and short message service.

Eavesdropping refers to:

Which of the following statements about Google's Project Fi is NOT true?

Mobile commerce refers to a real-time, wireless connection between a mobile device and other computing environments.

With which type of satellite is there a propagation delay?

Which of the following is a disadvantage of using a microwave transmission system?

Which of the following best describes the Internet of Things?

The major security threats to wireless communications include:

A(n) _____ allows unauthorized entry into a wireless network.

Which of the following is the most appropriate wireless technology for real-time location of caregivers and mobile equipment in health-care environments?

A transmitter with an antenna that connects a mobile device to a wired local area network is called a _____.

Microwave transmissions are broadcast, whereas satellite transmissions are point-to-point.

Which type of satellite requires the highest number of satellites for global coverage?

Which of the following characteristics distinguishes mobile computing from other forms of computing?

Mobile computing has two major characteristics that differentiate it from other forms of computing. What are these two characteristics?

Using your cell phone to purchase a Coke from a vending machine is an example of _____.