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