fianl Flashcards
the lower the dot pitch
the clearer the images
scanning devices
optical scanners, card readers, bar code readers, RFID Readers, MICR
RFID
tiny chips in almost everything can be found in products, drivers licenses, passports, etc
MICR
used by banks to read checks
Types of Bar codes
UPCs (Retail) , MaxiCode (Mail)
SDLC
Program specification, Program design, Program code, Program test, Program documentation, Program maintenance
Program Specification
programs objectives outputs, inputs, and processing requirements
Program design
a solution created with top-down program, pseudocode, flowcharts, and logic structures
program code
program is written or coded using a programming language
program test
program is tested or debugged
program documentation
documentation is ongoing, formalizing written description and processes used in program
program maintenance
periodically reviewed to evaluate accuracy
types of memory
RAM - temporary and volatile, ROM - nonvolatile storage, Flash memory
how does a hard disk store data
read/write heads
WEB 1.0
search engines
web 2.0
dynamic content (facebook)
web 3.0
identifies relationships between data, personalized content
web 4.0
mobile web, mobile devices
mass storage devices
file servers, network attached storage, RAID, organizational cloud storage
wi-fi
bluetooth, cellular, wifi, satellite,microeave, infrared,WeMax, GPS
network topologies
point-point, bus, ring,
bandwidth
measurement of the width or capacity of the communication channel
modems
modulate and demodulate, measured in megabits per second
types of operating systems
embedded OS (smartphones, tablets), Standalone OS (desktops), Networking OS (used to run networks)
disk caching
read from the hard disk into memory
Types of optical discs
CD’s,DCD’s, BD’s
URL
for browsers to connect you to resources
client server
use central servers to coordinate and supply services to other nodes on the network.
peer-to-peer
nodes have equal authority and can act as both clients and servers
mesh network
newest topology, each node have more than one connection to the other nodes
star network
each device is connected directly to a central network switch
tree network
each device id connected to a central node
top down analysis
used to identify top level components of a complex system,
grid charts
show relationship between input and output
system flowcharts
show the flow of input data to processing and to output/distribution of info
data flow diagram
show the data/info within anf info system
extranet
private network that connects more than one organization
firewall
security hardware and software
proxy server
computer that acts as a gateway/checkpoint in an org
VPN
creates a secure private connection between a remote user and an organization internal network
ergonomics
study of human factors related to things people use
FiOS
fiber optic service used by google and verizon with speeds faster than cable
voiceband
aka low bandwidth, used for landline telephone communication
cold boot
starting a computer after its been turned off
warm boot
restarting computer while the computer is on
google chrome, android
based on linux
virtualization
a process that allows a single physical computer to support multiple operating systems
Type 2 hypervisor
runs inside (hardware-host od-hypervisor-guest os)
spiders
update search services
deep fakes
indivuals appearence/message is changed
“Anyone can read a blockchain, and anyone can hold a copy of the blockchain.”
true
components of cloud computing
clients, internet, providers
Apple Health Web 3.0?
yes
Types of prototype models
rapid throwaway, evolutionary, incremental, extreme
