CIS chapter 8
2 types of RFID tags
-Active RFID tags use the internal batteries for power, and they broadcast radio waves to a reader. -Passive RFID tags rely entirely on readers for their power
Mobile computing
A real-time connection between a mobile device and other computing environments, such as the Internet or an intranet.
Wireless Fidelity
A set of standards for wireless local area networks based on the IEEE 802.11 standard.
Propagation delay
Any delay in communications from signal transmission time through a physical medium
Bluetooth
Chip technology that enables short-range connection (data and voice) between wireless devices.
3 types of satellites circling Earth
geostationary-earth-orbit (GEO) medium-earth-orbit (MEO) low-earth-orbit (LEO): requires the highest number of satellites to cover the earth
Mobile computing has 2 major characteristics
Mobility: means that users carry a device with them and can initiate a real-time contact with other systems from where ever they happen to be. Broad reach means the fact that when users carry an open mobile device, they can be reached instantly, even across great distances.
Cellular telephones (cell phones)
Phones that provide two-way radio communications over a cellular network of base stations with seamless handoffs.
Mobile portal
A portal that aggregates and provides content and services for mobile users.
Internet of Things (IoT) Also called Internet of everything Internet of anything the industrial internet machine-to-machine (M2M) communication
A scenario in which objects, animals, and people are provided with unique identifiers and the ability to automatically transfer data over a network without requiring human-to-human or human-to-computer interaction.
Hotspot
A small geographical perimeter within which a wireless access point provides service to a number of users.
Location-based commerce (or L-commerce)
Mobile commerce transactions targeted to individuals in specific locations, at specific times.
collect data from many points over an extended space
Wireless sensor networks
Wide-area- wireless networks
connects users to the internet over geographically dispersed territory.
advantage of satellite
high bandwidth large coverage area
advantage of microwave
high bandwidth relatively inexpensive
MiFi
is a small, portable wireless device that provides users with a permanent WiFi hotspot wherever they go. Thus, users are always connected to the internet.
disadvantage of microwave
must have unobstructed line of sight susceptible to environmental interference
Telemetry
The wireless transmission and receipt of data gathered from remote sensors.
Wireless devices provide 3 major function to users
-they are small enough to easily carry or wear -they have sufficient computing power to perform productive tasks -they can communicate wirelessly with the internet and other devices.
Wireless local area networks (WLANs)
A computer network in a limited geographical area that uses wireless transmission for communication.
Personal area network
A computer network used for communication among computer devices close to one person.
Ultra-wideband
A high-bandwidth wireless technology with transmission speeds in excess of 100 Mbps that can be used for applications such as streaming multimedia from, say, a personal computer to a television.
wireless access point.
A transmitter with an antenna that connects a mobile device to a wired local area network is called a(n)
Satellite radio
A wireless system that offers uninterrupted, near CD-quality music that is beamed to your radio from satellites.
Microwave transmission systems
A wireless system that uses microwaves for high-volume, long-distance, point-to-point communication.
Global positioning system (GPS)
A wireless system that uses satellites to enable users to determine their position anywhere on Earth.
Radio-frequency identification RFID was developed to replace bar codes
A wireless technology that allows manufacturers to attach tags with antennas and computer chips on goods and then track their movement through radio signals.
Satellite transmission systems
A wireless transmission system that uses satellites for broadcast communications.
Wireless sensor
An antenna connecting a mobile device to a wired local area network.
Mobile commerce
Electronic commerce transactions that are conducted with a mobile device.
Near-field communications (NFC)
The smallest of the short-range wireless networks that is designed to be embedded in mobile devices such as cell phones and credit cards.
Voice portal
The voice equivalent of a Web portal, providing access to information through spoken commands and voice responses.
Radio transmission
Uses radio-wave frequencies to send data directly between transmitters and receivers.
WiFi direct
enables peer-to-peer communications, so devices can connect directly. It allows users to transfer content among devices without having to rely on a wireless antenna.
disadvantage of satellite
expensive must have unobstructed line of sight signals experience propagation delay must use encryption for security
near-field communication
has the smallest range of any short-range wireless networks
Smartphone
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
Radio-frequency (RF) jamming
is a person, or device intentionally or unintentionally interferes with your wireless network transmissions.
Rouge access point
is an unauthorized access point to a wireless network. The rogue is an "evil twin" someone who wishes to access a wireless network for malicious purposes.
downside of smartphones
is that people can use them to copy and pass on confidential information
War driving
is the act of locating WLANs while driving or walking around a city pr elsewhere. To drive or walk you simply need a WiFi detector and a wirelessly enabled computer
Wireless Application Protocol
is the standard that enables wireless devices to access Web-based information and services.
Using your cell phone to purchase a Coke from a vending machine is an example of
micropayment
Dematerialization
occurs when the many function of many physical devices are included in one other physical device. ex: you get camera, calculator, the web, video games, etc. all in your phone now.
The technology that uses radio waves to identify individual items is
radio-frequency identification.
Eavesdropping
refers to the efforts by unauthorized users to access data that are traveling over wireless networks
3 factors prevent the commercial WiFi market from expanding even furhter
roaming security cost
4 types of threats to wireless networks
rogue access points, war driving, eavesdropping, radio-frequency jamming.
Short-range wireless networks
simplify the task of connecting one device to another. In addition they eliminate wires, they enable users to move around while they use the device
mobile financial applications
the bottom line for mobile financial applications is to make it more convenient for customers to transact business regardless of where they are or what time it is
Wireless media, or broadcast media, transmit signals without wires.
the major types of wireless media are microwave, satellite, and radio.
Super WiFi
was designed by the U.S federal communication commission (FCC) to describe a wireless network proposal that creates long-distance wireless internet connections. Super WiFi uses the lower-frequency "white spaces" between broadcast TV channels. These frequencies enable the signal to travel further and penetrate walls better than normal WiFi frequencies.
The development of mobile commerce is driven by the following factors
widespread availability of mobile devices. bandwidth improvement.