Chapter 3 Flashcards

1
Q

Moore’s Law

A

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

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2
Q

chip-based technology

A

integrated circulation of transistors

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3
Q

transistor

A

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

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4
Q

6 waves of computing

A
  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
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5
Q

Lecture timeline of waves

A
  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
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6
Q

microprocessor

A

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

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7
Q

random access memory (RAM)

A

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

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8
Q

volatile memory

A

memory for which data disappears when it is turned of

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9
Q

flash/ SSD-disk

A

non-volatile memory –> robust and expensive

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10
Q

hard disk drive

A

non-volatile memory –> rotating magnetic disk!

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11
Q

optical data storage devices

A

have an optical reader that reads data from the disk

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12
Q

multicore processor

A

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

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13
Q

supercomputers

A

among the fastest computers in the world

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14
Q

massively parallel processing

A

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

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15
Q

grid computing

A

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

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16
Q

cluster computing

A

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

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17
Q

digital subscriber line

A

cable through which the telephone network enters houses

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18
Q

cable broadband

A

television signal to houses

19
Q

data format

A

rules for the data that will be sent

20
Q

data transmission

A

ensures the exchange of data

21
Q

internet backbone

A

largest data collections on the internet

22
Q

last mile

A

technologies that connect users to the internet

23
Q

Amdahl’s law

A

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

24
Q

broadband

A

super fast internet connections

25
Q

bandwidth

A

network transmission speed

26
Q

HTTP

A

between web browsers

27
Q

SMTP

A

exchange of emails

28
Q

FTP

A

exchange of files

29
Q

peer-to-peer model

A

participant is both supplier and consumer of resources

30
Q

client-server model

A

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

31
Q

application transfer protocol (ATP)

A

http, SMTP of FTP

32
Q

host

A

www

33
Q

load balancing

A

load balancing improves the distribution of workloads across multiple computing resources, such as computers

34
Q

domain name

A

brand or company

35
Q

cybersquatting

A

domains of well-known brands are reserved with the purpose of selling them later

36
Q

top-level domain name

A

country or type of industry

37
Q

path

A

to get to the right tab of the website

38
Q

network address translation (NAT)

A

ensures that multiple devices share the same IP address

39
Q

domain name service (DNS)

A

translates domain names to IP addresses

40
Q

peering

A

when internet providers exchange data for free at the internet exchange points

41
Q

colocation facility

A

a place where peering takes place

42
Q

infrastructure as a service (IaaS)

A

the user gets access to hardware like computers, storage and network facilities –> least extensive form as the user still has to develop software and applications (Most customisation!)

43
Q

platform as a service (PaaS)

A

access to complete development and implementation environment

44
Q

software as a service (SaaS)

A

most complete cloud computing: end users! receives a complete online service