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IT > internet and WWW LU7 > Flashcards

internet and WWW LU7 Flashcards

1
Q

what is the internet

A

GAN
worldwide collection of computer networks that can be connected to share resources + communicate

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2
Q

how is info transferred using internet

A

travels through several interconnected networks

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3
Q

host

A

sender or receiver computer

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4
Q

how are hosts connected

A

bounded or unbounded communication links

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5
Q

routers

A

devices that determine paths data must travel along to get from one host to other using communication link

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6
Q

services on the internet

A

cloud storage
email
websites

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7
Q

cloud storage

A

storage of data online in the cloud

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8
Q

benefits of cloud storage

A

no need to buy new equipment
don’t need to manage + maintain expensive storage devices
automatic remote backup
only pay for storage space you use
can access anytime any place any device as long as internet

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9
Q

cons of cloud storage

A

unreliable internet connection can stop data access
no control over security of company-have to trust contract
company could close/irrecoverable disaster

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10
Q

protocol to send messages

A

SMTP

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11
Q

protocols to receive messages from mail server

A

POP IMAP

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12
Q

what is a website

A

collection of linked web pages that can be accessed using internet browser

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13
Q

how do you access websites

A

accessed by their domain name

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14
Q

TCP

A

transmission control protocol
responsible for making sure transmission gets from sender host to it’s destination

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15
Q

IP

A

internet protocol
identifies diff computers connected to the internet

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16
Q

advantages of TCP/IP Suite

A

allow direct access to the internet
enable communication between completely different computer systems

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17
Q

DNS

A

domain name system
addressing system that assigns unique names + numbers to hosts

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18
Q

hostname

A

domain name
made up of words

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19
Q

IP address

A

unique 32-bit number or 128 bit number
divided into four 8 bit numbers (0-255)

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20
Q

what is needed to connect computer to the internet

A

network card
software eg internet browser
device eg router

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21
Q

what is needed to connect mobile device to the internet

A

sim card
browser software
wifi capabilities

22
Q

adsl

A

asymmetric digital subscriber line
data communications technology that provides fast data transmission over copper cables

23
Q

fibre

A

data communications technology that uses light to transmit data at fast speeds and high capacities

24
Q

wireless/wifi

A

uses radio frequency

25
Q

cellular

A

sim card
3G+ 4G (

26
Q

www

A

world wide web
mass of linked web pages that can be accessed via internet
interconnected docs connected by hyperlinks and URLs
navigate to diff pages via hyperlinks
runs ON the internet

27
Q

web page

A

any document on the web

28
Q

URL

A

uniform resource locator
unique address of web page on the internet

29
Q

http://.

A

hypertext transfer protocol
rules for communicating on the internet

30
Q

https://.

A

hypertext transfer protocol
safe for user to enter private information

31
Q

web browser

A

program used to locate and view web pages
processes HTML code + displays in browser window
bookmarks,refresh,page tabs

32
Q

search engine

A

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

33
Q

what is the best way to search

A

state exactly what you want to find
identity keywords
use synonyms

34
Q

logical operators

A

define logical relationship between search terms
reduces number of returns in internet searches
AND OR NOT

35
Q

AND

A

+

must contain BOTH items
limits search results

36
Q

OR

A

|

either one or several or all
more results returned

37
Q

NOT

A

excludes keywords
when search use -

38
Q

false positive results

A

many results that are not relevant to the query

39
Q

role of user interface design

A

provide system for user to interact w a system such as website or computer program

40
Q

CLI

A

command line interface
requires user to type commands to instruct system

41
Q

GUI

A

graphical user interface
click on icons

42
Q

why is command line interface tricky to use

A

user must learn large list of commands
commands can be misspelt

43
Q

what do good user interface designs include

A

consistency
readability
layout
typography or use of colour (w/ theme)

44
Q

how do we ensure good readability

A

ensure fonts are readable and available in all web browsers
use recognisable icons
reduce number of elements on screen
place elements in usable,recognisable locations

45
Q

what is the 3 click rule

A

once entering a website a user should achieve their aim in a minimum of 3 clicks

46
Q

how do you achieve navigation between pages

A

menu bars and buttons
headings
hyperlinks

47
Q

how do you utilise typography to have a good user interface design

A

not too many colours
fonts dark and large enough to read
dark colours light background vice versa
use colours in expected way (red danger)

48
Q

what elements go into the user interface design

A

readability
navigation
typography
layout
theme
consistency

49
Q

In boolean logic what does a 1 stand for?

A

true

50
Q

What are the types of connections used to connect large networks or personal devices to the internet

A

Asymmetric Digital Subscriber Line (ADSL)
Fibre
Wireless (WI-FI)
Cellular

51
Q

what are the types of internet connections

A

adsl
fibre
wireless
cellular

IT (17 decks)

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