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cs
68 cards·by jp
two most important protocols
TCP and IP
file extension
file type and compression
internet works on
packet switching
working with two or more programs at once
multitasking
integrated circuits
3 hardware
description of entire database
schema
tape backup unit
sequential storage device
keeping data is referred to as
storage
programs and data are stored in
files
basic unit of info
bit
antivirus is a
utility program
more advanced than hardware
software
formatting a disk gives you the size of
sectors
computers connected to communicate and give each other data
network
device on the network
host
enables people to do things without skill
algorithm
least reliable memory source
RAM
storage device with no moving parts
solid state
screen resolution is based on
pixels
most popular internet application
email
html stands for
hypertext markup language
analytical engine to perform different functions
ada
analytical engine
babbage
electro mechanical tabulator
herman
mass storage is
non volatile
logical view operating system provides so user can manage info as a collection of files
file system
distinction b/w application and system
1 software
files accessed in linear fashion
sequential access
long sequences of the same value you would need to use
run length encoding
uses binary strings to compress
huffman encoding
real time operating systems have
predictable response times
hard disk as an extension of RAM
virtual memory
convert a text to a number
value function
model of a complex system and experimenting to observe the results
simulation
abstraction of a real system
model
biology models are examples of
continuous simulation
dynamic entities used to solve problems and interact with their environment
computing systems
directions that begin at the root directory
absolute path
directions that begin at the working directory
relative path
digitizing data by measuring voltage signals
sampling
logical view of the file system so the user can manage files as a collection of folders
directory tree
16 bit color depth
hi color
24 bit color depth
true colour
removing the redundant info in the frame
spacial compression
only keeping the changes b/w frames
temporal compression
combination of gates to do more complicated tasks
circuit
multiply the input values
and
add the input values where 1+1=1
or gate
add the input values where 1+1=0
xor gate
invert the input values
not gate
acts as a conductor or resistor
transistor
example of sequential circuit
SR latch
device that brings results to the outside world
output unit
system that allows multiple users to interact with a computer at the same time
timesharing
core of the systems software
operating system
provides a generic location relative to the program but not main memory
logical address
current executing process gives up CPU voluntarily
non preemptive
operating system favours another process so the current process is preempted
preemptive
time in between when process arrives in the ready state to when it leaves in the running state
for the last time
turnaround time
brings 2 relations together
join
copies attributes
project
copies rows
select
device that stores and manages files for other users on the network
file server
device that responds to web page requests
web server
transfer data to your computer
routers
strengthen the data as it is carried
repeaters
gateway to protect from bad access
firewall
convert hostname to IP adress
domain name system