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Flashcards in Chapter 3 Deck (44)
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1

Moore's Law

performance of a chip doubles every 2.5 years --> uses chip-based technology

2

chip-based technology

integrated circulation of transistors

3

transistor

amplifies or switches electronic signals --> input is either switched on or off

4

6 waves of computing

1. computers invented --> filled a whole room (large companies and authorities)
2. Moore's law became applicable --> computers have the size of refrigerator and become faster and cheaper
3. almost every manager has a computer and the internet emerges --> majority of the people have a computer as data sharing around the world became possible
4. user-friendly interfaces operated with a mouse
5. simple mobile phones become popular
6. now

5

Lecture timeline of waves

1. Mainframe era: centralised data processing systems --> transistors are used (1 wave)
2. introduction of minicomputers: decentralised computing (2 wave)
3. personal computing era: first personal computer --> computers are used at home and at the office (3+4 wave)
4. client-server era: client-server model is created

6

microprocessor

ensures the execution of programs --> brain of the computer that executes the commands

7

random access memory (RAM)

memory for which data disappears when it is turned of --> extremely fast as it is powered by chips and transistors

8

volatile memory

memory for which data disappears when it is turned of

9

flash/ SSD-disk

non-volatile memory --> robust and expensive

10

hard disk drive

non-volatile memory --> rotating magnetic disk!

11

optical data storage devices

have an optical reader that reads data from the disk

12

multicore processor

has two or more working cores --> two computers working simultaneously (people lifting a table)

13

supercomputers

among the fastest computers in the world

14

massively parallel processing

computers exists of many microprocessors that joint and simultaneously work to solve problems

15

grid computing

combining the computing power of many normal computers to joint carry out a task using specialised software

16

cluster computing

computers are linked together to do tasks together --> much more closely linked and by special software and network hardware --> servers can also work together

17

digital subscriber line

cable through which the telephone network enters houses

18

cable broadband

television signal to houses

19

data format

rules for the data that will be sent

20

data transmission

ensures the exchange of data

21

internet backbone

largest data collections on the internet

22

last mile

technologies that connect users to the internet

23

Amdahl's law

the speed of any network component is determined by the speed of the slowest component

24

broadband

super fast internet connections

25

bandwidth

network transmission speed

26

HTTP

between web browsers

27

SMTP

exchange of emails

28

FTP

exchange of files

29

peer-to-peer model

participant is both supplier and consumer of resources

30

client-server model

servers and consumers differ from eachother --> servers are always active and wait for a consumer to come onlien