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IB Computer Science (SL) > 1.5 Components of a Computer System > Flashcards

1.5 Components of a Computer System Flashcards

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1
Q

Components of a computer system (5)

A

(1) computer hardware
(2) software
(3) peripheral device
(4) computer network
(5) human resources

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2
Q

what is computer hardware

A

the physical elements of a computer

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3
Q

example of computer hardware

A
  • screen
  • CPU
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4
Q

what is software

A

a series of instructions that can be understood by a CPU

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5
Q

what can instructions in software do?

A

guide the CPU to perform specific operations

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6
Q

what is software compromised of?

A

programs and data

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7
Q

what is a peripheral device

A

any auxiliary device that can communicate and work with a computer

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8
Q

what does auxiliary mean

A

providing additional help and support

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9
Q

examples of peripheral devices

A
  • input/output devices
  • printers
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10
Q

what is a computer network

A

a set of computer systems that are interconnected and share resources and data

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11
Q

examples of computer networks

A
  • Local Area Network (LAN)
  • Wide Area Network (WAN)
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12
Q

what are human resources

A

people who are used of could be used in an organization, business or economy

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13
Q

roles of a computer in a networked world (8)

A

being a/an…
(1) dumb terminal
(2) thin client
(3) client
(4) email server
(5) router
(6) Domain Name System
(7) firewall
(8) Client-server

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14
Q

what is a dumb terminal

A

a device that usually consists of a keyboard, a monitor an a network card that is connected to a server or a powerful computer

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15
Q

how independent is a dumb terminal?

A

not at all - it depends entirely on the computer that they are connected to

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16
Q

what do dumb terminals rely on the computer they are connected to for?

A
  • computations
  • data managements
  • data processing
17
Q

example of where you would find a dumb terminal

A

an office building

18
Q

what is a thin client?

A

a relatively low performance terminal

19
Q

how independent is a thin client?

A

not very - it heavily, but not entirely, depends on the server that it is connected to

20
Q

what is a client? (i.e. normal computer)

A

an average computer terminal (dumb terminal or thin client) used to access a computer-based system

21
Q

logic behind computers (clients) and dumb terminals

A

you can make a computer into a dumb terminal but not a dumb terminal into a client

22
Q

what does an email server do? (3)

A

(1) manages the flow of email in and out of the network
(2) checks that an email address is valid
(3) allows users to access their email

23
Q

process of an email server

A

receive –> process –> save –> send out

24
Q

what is a router?

A

a networking device

25
Q

what does a router do?

A

(1) accepts incoming data packets
(2) reads the destination address of a data packet
(3) distributes data packets across networks

this is all done according to a routing table or routing policy (routing based policy)

26
Q

example of a router

A

a wifi router

27
Q

what does DNS server stand for?

A

Domain Name System server

28
Q

what does DNS server do?

A

(1) attributes names to network addresses
(2) allows you to type names into the address bar of your web and automatically finds that address on the internet

29
Q

analogy of what DNS sever is

A

the address book of the internet

30
Q

how long does it take to update addresses in a DNA server?

A

around 24 hours

31
Q

what is a firewall

A

a hardware or software network infrastructure that controls data flow access among network entities

32
Q

what does the ideal firewall configuration consist of?

A

both hardware and software components

33
Q

what is a client-server?

A

a software network architecture system where clients request information and servers perform tasks in order to provide the information

34
Q

main difference between server and clients

A

servers: share their resources
clients: does NOT share their resources

35
Q

example of server-client servers

A
  • DNS server
  • web browser
    -web server

IB Computer Science (SL) (6 decks)

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