Chapter 8 Flashcards
Wireless
Communication using electromagnetic waves to transmit signals between devices
Mobile
Something that moves or changes its location over time
Mobile Computing
A wireless, real-time connection between a mobile device and other computing systems, like the internet or an intranet
Mobile Commerce (M-Commerce)
E-commerce transactions done using a mobile device
Wireless Device Advantages
Portable
Enough Computing Power
Wireless Connection
Dematerialization
When multiple physical devices’ functions are combined into one device
Downside of Smartphones
Confidential Info Leak
Scam Calls
Types of Wireless Transmission Media
Microwave
Satellite
Radio
Microwave Transmission
A wireless system for high-volume, long-distance communication between two points
Disadvantages of Microwave Transmission
Unobstructed Line of Sight
Environmental Interference
Satellite Transmission
A wireless system that uses satellites to transmit broadcast communications
Satellite Transmission Disadvantage
Expensive
Unobstructive Line of Sight
Signal Delay
Need Security Encryption
Types of Telecommunications Satellites
GEO
MEO
LEO
Propagation Delay:
The delay in communication caused by the time it takes for a signal to travel through a medium
Global Positioning System (GPS)
A wireless system that uses satellites to help users determine their location anywhere on Earth
Internet over Satellite (IoS)
In areas where installing cables is too costly or impossible, IoS allows users to access the internet via GEO satellites using a dish mounted on their homes
Commercial Imaging
This involves using small satellites, called nanosatellites, to capture images from orbit
Radio Transmission
Uses radio waves to send data directly between transmitters and receivers
Radio Transmission Advantages
Passes Through Walls
Cheap and Simple
High Speeds
Radio Transmission Disadvantages
Electrical Interference
Eavesdropping
Too Far=Static
50-65 km
Satellite Radio (Digital Radio)
A wireless system that provides uninterrupted, near CD-quality sound broadcasted from satellites to your radio.
Wireless Networks Threats
Rogue Access Points
War Driving
Eavesdropping
Radio Frequency Jamming
Rogue Access Point
Unauthorized access points set up either accidentally or by attackers to steal information
War Driving
Searching for wireless networks while moving around. Unauthorized users can find and access networks to get free internet or steal data
Bluetooth
Technology that allows short-range connections (for data and voice) between wireless devices
Personal Area Network (PAN)
A network used for communication between devices close to one person.
Bluetooth Benefits
Low Power
Emits in All Directions
Location Service
Ultra-Wideband (UWB)
A high-speed wireless technology with transmission speeds over 100 Mbps, used for applications like streaming multimedia from a personal computer to a television
Near-Field Communication (NFC):
A short-range wireless network with a very small range, designed to be used in mobile devices like cellphones and credit cards
Wireless Local Area Network (WLAN)
A computer network in a small area that uses wireless transmission to communicate
Wireless Fidelity (Wi-Fi)
A set of standards for wireless local area networks, based on the IEEE 802.11 standard.
Wireless Access Point
An antenna that connects a mobile device to a wired local area network
Hotspot
A small area where a wireless access point provides service to multiple users
Cellular Telephones (Cellphones)
Phones that provide two-way radio communication over a cellular network, allowing for seamless hand-off between base stations
Fifth-Generation (5G) Cellular Networks
Fifth-generation cellular network technology, offering faster speeds, lower latency, and enhanced performance compared to previous generations
Types of 5G
Low-Band
Mid-Band
High-Band
5G Uses
Enhance Agricultural Productivity
Improved Remote Education
Advanced Healthcare
Improved Manufacturing
WiMAX (Worldwide Interoperability for Microwave Access)
Wireless broadband technology defined by IEEE Standard 802.16
WiMAX Features
Long-Range
High Data Transfer Rates
Security
Used in Emergency Situations
Mobile wallet (m-wallet)
Lets users make purchases easily with just one click on their mobile device
Location-based commerce (L-commerce)
When businesses send offers or services to people based on where they are and what time it is
Mobile Computing Characteristics
Mobility
Broad Reach
Telemetry
Wireless transmission and reception of data collected from remote sensors
The Internet of Things (IoT)
A system where everyday objects, animals, and people are equipped with unique identifiers (like sensors or RFID tags) and can automatically send data over a network
The Internet of Things (IoT) Issues
Security
Privacy
The Internet of Things (IoT) Org Benefits
Hospitality
Farming
Wireless Sensor
A device that tracks things like temperature, sound, or movement and sends the info wirelessly
Radio-Frequency Identification (RFID) Technology
A wireless tech that uses tags with antennas and chips to track the movement of goods using radio signals
RFID Used in Businesses
Inventory Management
Supply Chain Tracking
Access Control
