Chapter 10 - Wireless Computing
MEO and GEO
Satellite Radio is supported by what kind of satellite?
carry; wear; computing power; wirelessly
Wireless devices provide three major advantages: 1) they are small enough to _______ or _______ 2) they contain sufficient _______ to perform productive tasks 3) they can communicate _________ with the internet and other devices
wide-area
________ wireless networks connect users to the Internet over a large, geographically dispersed territory
Ultra-wideband
a high-bandwidth short tange wireless network with transmission speeds in excess of 100 Mbps which makes it an excellent choice for applications such as streaming multimedia from a personal computer to a television
Dematerialization
a phenomenon that occurs when the functions of many physical devices are broken down into one physical device
Mobile Computing
a real-time, wireless connection between a mobile device and other computing environments, such as the Internet or an Intranet
Bluetooth 1.0
a short-range wireless network that can link up to eight devices within a 10-meter area with a bandwidth of 700 Kbps using low-power, radio-based communication
Bluetooth 4.0
a short-range wireless network that can transmit up to approximately 25 Mbps up to 100 meters
bluetooth
a short-range wireless network that was an industry specification used to create small personal area networks
Mi-Fi
a small, portable wireless device that provides users with a permanent Wi-Fi hotspot wherever they go with a range of about 10 meters
Internet of Things
a system in which any object, natural or manmade, has a unique identity (i.e., its own IP address) and is able to send and receive information over a network (i.e., the Internet) without human interaction
Hotspot
a wireless access point that provides service to a number of users within a small geographical perimeter (300 ft)
Super Wi-Fi
a wireless network proposal that creates long-distance wireless Internet connections which uses the lower-frequency "white spaces" between broadcast TV channels which enable the signal to travel further and penetrate walls better than normal Wi-Fi frequencies
footprint
the area of Earth's surface reached by a satellite's transmission; the higher a satellite, the larger this is.
Mobility
the idea that users can carry a device with them and can initiate a real-time contact with other systems from wherever they happen to be
Broad Reach
the idea that when users carry an open mobile device, they can be reached instantly, even if they are across incredibly large distances
Telemetry
the wireless transmission and receipt of data gathered from remote sensors used to identify maintenance problems in equipment, monitor medical patients, remote vehicle diagnosis & preventive maintenance, and Find My IPHONE
Radio
uses radio-wave frequencies to send data directly between transmitters and receivers; however it is quite susceptible to snooping and degrades with distance
Pervasive Computing
virtually every object has processing power with either wireless or wired connections to a global network
WiMax
wide-area wireless network that allows wireless Internet access over a wide area with fantastic transfer rates and security measures
Cellular radio
wide-area wireless network that provides two-way radio communications over a cellular network of base stations
Motes
wireless sensors that collect data from many points over an extended space and contain processing, storage and radio-frequency sensors and antennas
medium-range
______ Wireless Networks are the most familiar wireless local area networks (WLANs) such as WiFi.
short-range
______ wireless networks have a range of 100 feet or less
Mobile Commerce
e-commerce transactions conducted with a mobile device
Wireless Sensor Network
network of interconnected, battery-powered motes that are placed into the physical environment
wireless
without wires
MEO
GPS is supported by what kind of satellite?
the gap is covered by nearby motes
If one mote fails, ___________ (the whole system fails/the gap is covered by nearby motes)
LEO
Phone signals are supported by which kind of satellite?
GEO
TV signals are supported by which kind of satellite?
Rogue Access Point
WIRELESS SECURITY THREAT: An unauthorized wireless access point (WAP) installed in a computer network purposely created to look like a similar name as the actual network
Radio-frequency Jamming
WIRELESS SECURITY THREAT: a person or a device intentionally or unintentionally interferes with your wireless network transmissions
Eavesdropping
WIRELESS SECURITY THREAT: efforts by unauthorized users to gain data that are traveling over wireless networks or access to a network
802.11
Wi-Fi standard
Mobile Advertising
a form of advertising via cell phones, smartphones, or other mobile devices
Wireless Mesh Networks
medium range wireless networks that use multiple Wi-Fi access points to create a wide area network that can be quite large and are essentially a series of interconnected local area networks
Propagation Delay
one major limitation of GEO satellites is that their transmissions take a quarter of a second to send and return from the Earth's surface
War Driving
WIRELESS SECURITY THREAT: the act of locating a WLAN with no password while driving around a city or town
low; security; roam
The major benefits of Wifi is that the cost is very _____ and it can provide simple Internet access. However, ______ issues and the inability to ______ from hotspot to hotspot is preventing commercial Wi-Fi from expanding
Internet over Satellite (IoS)
in remote parts of the world, the only option for internet access; however, it comes with a massive propagation delay
Wi-Fi Direct
medium-range wireless network that enables peer-to-peer communications, so devices can connect directly allowing users to transfer content among devices without having to rely on a wireless antenna. It can connect pairs or groups of devices at Wi-Fi speeds of up to 250 Mbps and at distances of up to 800 feet
Near-Field Communications
short-range wireless network that has the smallest range of any and is designed to be embedded in mobile devices such as cell phones and credit cards
mobile
something that changes its location over time
RFID
technology that allows manufacturers to attach tags with antennas and computer chips on goods and then track their movement through radio signals; developed to replace bar codes
Mobile Wallets
technology that provides an alternative to swiping a plastic card at the checkout counter; consumers merely wave their phones a few inches above a payment terminal