chapter 8

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.

mobile computing

A real-time connection between a mobile device and other computing environments, such as the Internet or an intranet. ubiquity - where you go it goes convenience - it's there for you instant connectivity - if your in range of any network personalization - personalize your device location of products and services - there available to you where you are.

hotspot

A small geographical perimeter within which a wireless access point provides service to a number of users.

Internet of Things

A system where any object natural or manmade has a unique identity and is able to send or receive information over a network without human interaction. RFID wireless sensors

microwave

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. MEO

Radio-frequency identification

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

A wireless transmission system that uses satellites for broadcast communications. GEO orbit at 22,000 miles height BIG (Olympics) MEO orbit 6000 miles up middle earth (global positioning system) LEO 400-700 miles up small footprint and move fast

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. location based applications and serves Financial Services telemetry

location based applications and serves

Mobile commerce transactions targeted to individuals in specific locations, at specific times.

how do cellular telephones communicate

Phones that provide two-way radio communications over a cellular network of base stations with seamless handoffs. The cell phone communicates with radio antennas, or towers, placed within adjacent geographic areas called cells A telephone message is transmitted to the local cell—that is, the antenna—by the cell phone and then is passed from cell to cell until it reaches the cell of its destination. At this final cell, the message either is transmitted to the receiving cell phone or it is transferred to the public switched telephone system to be transmitted to a wireline telephone.

wireless

Telecommunications in which electromagnetic waves carry the signal between communicating devices. (smartphones)

telemetry

The wireless transmission and receipt of data gathered from remote sensors.

radio

Uses radio-wave frequencies to send data directly between transmitters and receivers.

Medium range wireless networks

Wireless Fidelity WiFi Direct Super WiFi MiFi Wireless Mesh Networks

radio-frequency (RF) jamming

a person or a device intentionally or unintentionally interferes with your wireless network transmissions.

short range wireless networks

bluetooth ultra-wideband Near-field communications

Wireless Fidelity

broadband wireless local area network Wireless access point & hotspot

advantages of QR codes

can store much more information. Data types stored include numbers, text, URLs, and even Japanese characters. are smaller because they store information both horizontally and vertically. can be read from any direction or angle, so they are less likely to be misread. more resistant to damage.

Wide-Area Wireless Networks

connect users to the Internet over a geographically dispersed territory. Cellular Radio Wireless Broadband or WiMAX

Eavesdropping

efforts by unauthorized users to access data that are traveling over wireless networks

Near-field communications

has the smallest range of any short-range wireless networks. It is designed to be embedded in mobile devices such as cell phones and credit cards.

MiFi

is a small, portable wireless device that provides users with a permanent Wi-Fi hotspot wherever they go.

QR code

is a two-dimensional code, readable by dedicated QR readers and camera phones.

rogue access point

is an unauthorized access point to a wireless network.

War driving

locating wireless LANs while driving (or walking) around with a Wi-Fi detector and a wirelessly enabled computer.

four major types of wireless media

microwave satellite radio infrared

microwave transmissions

offer only a limited solution to data communications needs, especially over very long distances. are susceptible to environmental interference during severe weather such as heavy rain and snowstorms. are still widely used, they are being replaced by satellite communications systems.

Financial Services

online banking, wireless payments, micropayments, wireless wallets

wireless access point

provides service to a number of users within a small geographical perimeter (up to approximately 300 feet), known as a hotspot. are needed to support a larger number of users across a larger geographical area. To communicate wirelessly, mobile devices, such as laptop PCs, typically have a built-in wireless network interface capability.

four major threats to wireless networks:

rogue access points, war driving, eavesdropping, and radio-frequency jamming

evil twin attack

the attacker is in the vicinity with a Wi-Fi-enabled computer and a separate connection to the Internet.

infrared

transmits data via red light (remote controller)