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IT > Unit 7 Internet And WWW > Flashcards

Unit 7 Internet And WWW Flashcards

1
Q

What is the internet

A

A global network of networks

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2
Q

What is the purpose of the internet

A

Sharing resources, communication, storage

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3
Q

What are examples of basic services of the internet

A

Email services and web sites

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4
Q

What are the three things involved when there is communication on the. Internet

A

Hosts, routers and links

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5
Q

What is a host

A

The sender or receiver of information — a node

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6
Q

What is a link

A

Wired or wireless media that connects hosts

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7
Q

What is a router

A

A specialised devices that connects networks together (it is a path(s) along which data travels from one host to another using a communication link)

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7
Q

What is a router usually used for

A

A router is usually used to connect an organisations network to an internet service providers network to enable internet access

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8
Q

What resources can you share in the internet

A

processing power, files (like music, videos, photos, movies etc), and storage

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9
Q

What are basic services on the internet

A

Cloud storage, email and websites

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10
Q

What is cloud storage

A

A remote service accessed via the internet

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11
Q

What is the opposite of remote

A

Local

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12
Q

What are examples of ISPs in sa

A

Vodacom, MTN, Telkom, Vumatel, Rain etc

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13
Q

What are the benefits of using cloud storage

A

-You do not have to buy new equipment
-you do not have to maintain expensive storage devices
-you can access the cloud storage at any time from any place and from any computer as long As you are connected to the internet
-you only pay for the storage you are using
-you have an automatic remote backup

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14
Q

What are some concerns about using cloud storage

A
  • An unreliable data connection can stop data access
  • security of your data is a concern as you have no control over the security of the cloud storage company other than to trust their contract
  • the company storing the data could close or have an irrecoverable disaster.
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15
Q

What is email short for

A

Electronic email

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16
Q

What is an email

A

Similar to a letter, an email is sent via the internet to any recipient who has an email address.

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17
Q

What protocol does email use for sending messages

A

SMTP

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18
Q

What protocol does email use for receiving messages

A

POP and IMAP

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19
Q

What is a website

A

A named location on the world wide web located using a URL

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20
Q

What doe WWW stand for

A

World wide web

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21
Q

What does URL stand for

A

Uniform Resource Locator

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22
Q

What does http stand for

A

Hypertext transfer protocol

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23
Q

What is hyper text

A

Html (hyper text markup language) is the language of the web

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24
Q

What is a protocol

A

A set of rules regarding communication (sending and receiving)

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25
Q

What are the most common protocols used by computers on the internet.

A

TCP and IP

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26
Q

What does TCP stand for

A

Transmission control protocol

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27
Q

What does IP stand for

A

Internet protocol

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28
Q

What is TCP responsible for

A

Making sure that a transmission gets from the sender host to its destination host

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29
Q

What is IP responsible for

A

It identifies the different computers connected to the internet by using an IP address

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30
Q

What is an IP address

A

4 decimal numbers separated by dots and they will uniquely identify a device in a network

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31
Q

What are TCP and IP called collectively

A

The TCP/IP suite

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32
Q

What is the advantage of the TCP/IP suite

A

They allow direct access to the internet and they enable communication between computer systems that may be completely different

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33
Q

What does DNS stand for

A

Domain name system

34
Q

What is DNS

A

An addressing system used by the internet to assign names and numbers to the hosts /computers that are connected

35
Q

What does each host connected to the internet have

A

A domain name (also called host name) and a unique IP address to identify it.

36
Q

What is a hostname made out of

A

Words that are easy for humans to understand

37
Q

What is an IP address made out of

A

A 32 bit or 128 bit number which is difficult for humans to read.

38
Q

What does the IPv4 addressing system use

A

It uses 32 bits divided into four 8 bit numbers (ranging from 0-225) separated by dots.

39
Q

What can you do if you know the IP address of a destination computer

A

You can type it instead of a URL

40
Q

About how many IP addresses can be made with the IPv4 system

A

2^32 = 4.29 billion addresses

41
Q

Why has IPv6 been introduced

A

Because all the IPv4 addresses have been assigned to various institutions leading to a shortage of addresses

42
Q

What do you need to connect to the internet for a computer

A

For a computer:
- a network interface card (NIC) or wireless enabled computer
- software such as an internet browser
- a device such as a router/ wireless router which would enable you to either connect to a physical line or wireless access point

43
Q

What does WAP stand for

A

Wireless access point

44
Q

What do you need to connect to the internet for a mobile device

A

A computer with a:
- sim card for access to mobile data
- WIFI capabilities to enable the device to connect to a WIFI access point which is in range of the device or a personal hotspot
- a browser software app installed on the device.

45
Q

What are the types of connections

A

Fibre, wireless and cellular

46
Q

What is fibre

A

A data communications technology that uses light to transmit data at superfast speeds and high capabilities

47
Q

What does WIFI stand for

A

Wireless fidelity

48
Q

What is a wireless connection

A

Wireless or WIFI does not use telephone lines or cables to connect to the internet. Instead, it uses radio frequency.

49
Q

What is cellular

A

Is you are using a sim card in your device then you can access the internet from anywhere. The speeds can vary depending on the provider but the most common are 3G and 4G speeds.

50
Q

What does 3G stand for

A

3rd generation cellular network

51
Q

What does 4G stand for

A

4th generation of cellular wireless standards

52
Q

What is the world wide web

A

A mass of linked web pages which can be accessed via the internet

53
Q

How can you display hypertext documents

A

On a web browser and these documents can contain text, images, videos, sound and other multimedia

54
Q

What connects documents on the web

A

Through hyperlinks and URLs

55
Q

What is a web page

A

A document on the web which contains text, graphics, audios or hyperlinks

56
Q

What is a website

A

A web site is made up of a number of web pages together. It always has a home page

57
Q

What is http://

A

Rules for communicating on the internet

58
Q

What does the s mean in https mean

A

That the web page or site is safer in terms of user entering private information

59
Q

What is web browser

A

Software used that processes HTML to display pages or contents of the World Wide Web

60
Q

What are examples of web browsers

A

Google chrome, Microsoft edge, Apple safari, Mozilla Firefox, Opera.

61
Q

What are additional features on a web browser

A

Bookmark, page tabs, refresh, navigation etc

62
Q

What is a search engine

A

A program that searches documents on the web for specified keywords and returns a list of documents where the keywords were found with hyperlinks to the relative pages

63
Q

What do you need to do to ensure successful searching

A

State exactly what you want to find
Identify keywords
Use synonyms

64
Q

What does every and do to the search

A

Reduces results returned

65
Q

What does every or do to the search

A

Increases the results returned

66
Q

What does every not (“-“) do to the search

A

It excludes certain results

67
Q

What are false positive results

A

Results that are not relevant to the query

68
Q

What is the symbol for and

A

+

69
Q

What is the symbol for Not

A

-

70
Q

What is the symbol for or

A

|

71
Q

What is the order of operations for searches

A

Not
And
Or

72
Q

What does UIF stand for

A

User interface design

73
Q

What is the role of a user interface

A

To provide a system for a user to interact with a website or computer program

74
Q

What does CLI stand for

A

Command line interface

75
Q

What does a good user interface design include

A

Consistency, readability, layout, typography, or use of colour usually embodied in a theme

76
Q

What does a user experience designer do

A

They ensure the web site or computer program is:
-Easy to use
- has minimal steps
- uses the appropriate colour, font, layout

76
Q

What does a user experience designer do

A

They ensure the web site or computer program is:
-Easy to use
- has minimal steps
- uses the appropriate colour, font, layout

77
Q

What does good readability focus on

A

Reducing the number of elements on the screen. The elements of the interface must be placed in locations that make them easy to see, recognise and use

78
Q

What does good navigation focus on

A

The three click rule, menu bars and buttons, headings

79
Q

What is the three click rule

A

A user should be able to do anything on a web site or application Within three clicks

80
Q

What makes a good typography

A

Large enough to be readable, lighter colours on dark backgrounds and darker fonts on light backgrounds, use colours in the way the user would expect (red danger, yellow caution, green safety etc), and don’t include too many colours

81
Q

What makes a good layout

A

Putting the most important elements of the page where the reader is most likely to look

82
Q

What makes good consistency

A

Elements that behave the same should be consistent in colour, design and location on the screen

IT (8 decks)

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