past papers Flashcards
(98 cards)
1
Q
2 ways a smartphone can use a sensor
A
rotating screen, compass
2
Q
how is wired connection a health and safety problem
A
trailing wires
3
Q
word for devices sharing functions
A
convergence
4
Q
what does a router do
A
stores IP addresses and forwards network traffic to the right destination
5
Q
benefits of online TV
A
can pause/re-wind, wider variety of content, always availible
6
Q
what does ransomware do to files
A
encrypts them using a key
7
Q
benefit of using a TV screen
A
higher resolution
8
Q
advantage of using hosted applications
A
dont have to be downloaded
9
Q
why would bluetooth be used over infraed when exercising
A
infrared requires of line of sight which isnt possible when exercising
10
Q
how does encryption work
A
scrambles data so that it cant be understood
11
Q
what can be calculated by GPS data
A
ETA, distance travelled, speed
12
Q
what software is used to block MAC addresses
A
firewall
13
Q
advantages of teachers using LAN
A
reduced printer costs as they can share, can communicate using email to share files
14
Q
2 types of backup
A
incremental and full
15
Q
what does more RAM mean faster loading
A
more memory is allocated to applications and less virtual memory is used which as a slower read/write time
16
Q
what does RAM lose when turned off
A
its contents
17
Q
is magnetic tape storage media
A
yes
18
Q
web browser function
A
to display HTML web pages
19
Q
why would someone update a game
A
to get new features, to fix bugs
20
Q
what is required to make a online call
A
WAN
21
Q
how do reduce latency
A
reduce distance
22
Q
what does an ISP do
A
provide internet access to users
23
Q
2 benefits of client server network
A
centrallised back up point, so each device isn’t backed up separately, shred software meaning fewer installs
24
Q
how does an Inkjet printer work
A
print head moves up and down
25
why how does an inkjet printer produce a higher resolution
droplets can be combined to make a range of colours
26
how can social bookmarking be used in a project
tag bookmarks with key words, to share with members and share work load
27
what does a VPN provide
an encrypted connection
28
why does a higher bandwidth improve streaming
less likely to buffer and lag
29
functions of operating system
user management, memory management, file management, security, user interface
30
why is magnetic tape good for backup data
its portable so can be stored in a secure location
31
why does more RAM mean more applications can be open at the same time
more applications can run at once, because more instructions can be stored
32
what is print spooling and why is it used
Print spooling is when print jobs are stored in a queue on the computer or print server, so the printer can process them one at a time. It allows users to keep working while the document is waiting to print, instead of having to wait for printing to finish.
33
how can utility software reduce file access times
by defragmentation, reduces need for disc to spin
34
how does OMR identify text
optical
35
what does system software do
carry out tasks for the computer
36
key features of a blog
single page, timeline of posts
37
key feature of a website
interactive
38
challenges of using an acceptable behaviour policy with an online community
not everyone will agree, people can make single use accounts
39
how does cloud storage allow users to see data from other devices
sychronisng data
40
what does using key words in searched do
return more relevant results
41
what is used to connect at LAN to a WAN
gateway
42
benefits of playing music from home entertainment system
improved sound quality
43
why can you stream on the go
it doesn't require bulky storage
44
drawbacks of using cloud storage for backup
uploads will take a long time for large files, increased cost
45
benefits of sharing things using social networks
easier to share, more people can access, people can like/comment, people are alerted
46
characteristics of flash memory
can be re written, fast access times
47
how does flash memory store data
as electrical charges in cells
48
explain why flash memory must be non volatile
so that data is not lost when power is turned off
49
use of embedded system in a camera
compressing images, shutter speeds
50
advantages of using MAC address to identify devices instead of Ip
easier to identify devices
51
issues caused by not identifying devices on a network
lack of security, data can be transmitted to wrong device
52
disadvantage of connecting a printer to a network
can be overloaded with requests
53
passwords are a type of ...?
user permissions
54
2 features of online banking
increased access to support, secure payments
55
what does targeted markiting give
more relevant results
56
negative impact of internet access
easy to stay anonymous = cyberbullying , no need to move for services = reduced physical activity
57
how has internet helped employment
organizations can use employment networks
58
drawback of hosted storage
reduced data security
59
feature that is needed to download software
connectivity
60
what is meant by tethering
sharing of mobile broadband
61
what does a WAP do
allows wireless devices (like laptops, smartphones, tablets) to connect to a wired network using Wi-Fi.
62
What is the role of a router in a network?
A router connects multiple networks together and directs data packets to their correct destination, often linking a LAN to the internet.
63
What is the purpose of a modem?
A modem converts digital signals from a computer into analogue signals for transmission over phone lines — and vice versa.
64
What does a switch do in a network?
A switch connects multiple devices on a LAN and sends data only to the device it's intended for, improving network efficiency.
65
How is a hub different from a switch?
A hub sends data to all devices on a network, not just the intended one, making it less efficient than a switch.
66
What is the function of a NIC?
A NIC allows a computer or device to connect to a network, either wired or wirelessly.
67
What does a hardware firewall do?
It protects a network by filtering incoming and outgoing traffic, blocking unauthorized access.
68
benefits to employer from working from home
lower costs - no office space , improved productivity
69
latency definition
delay of data being sent between devices in a network
70
what does a VPN do
provides access to a private LAN from a remote location
71
what does a virus do
spreads malicious code through a device
72
why would someone user a filter in a family network
to block URLs so kids dont see inappropriate content
73
what does a sensor do after getting information from environment
create a response
74
characteristics of hard disk drives that make them more suitable for use in servers than magnetic tape
durable, faster access speeds
75
how can transactional data improve experience of users
looks at what they recently used to give more relevant results
76
why should a website provide accessibility features
legal requirment
77
2 protocols that could be used to secure online payments
HTTPS , WEP
78
drawbacks of comments on a VLE
people can get distracted and miss important content
79
what does the first part of an IP address identify - first 7 letters
Network ID
80
what does the last 2 number of an IP address identify
device ID
81
negative impacts of internet on working practices
distracted - less productive, isolated - lack of understanding
82
what does WEP stand for
wireless encryption protocol
83
what is WEP used for
to secure the wireless transfer of data.
84
why is WEP the least secure data encryption method
every device on the wireless network uses the same key for every transfer. This means that if an eavesdropped studies enough packets, they can identify the key and access all data from every device on the network
85
what does WPA stand for
WI-FI protected access
86
what is more secure WEP or WPA
WPA
87
why is WPA better then WEP
it generates a new key for each device on the wireless network, new keys are also provides for each packet of data that is sent
88
what does a VPN do
proves access to a private LAN from a remote location. The connection to the LAN is created using the infrastructure of a public network. Data sent using a VPN is encrypted
89
what would a VPN be used for
access a network when working from home, access things in different location because of local restrictions or geolocation rights, make secure payments, prevent surveillance and access to their web acitivity
90
public cloud definition
Services offered over the internet by third-party providers
91
private cloud definition
Cloud storage dedicated to one organization or user, either hosted on-premises or by a third party.
92
hybrid cloud definition
A mix of public and private cloud storage.
93
2 main types of software
system and application
94
operating system definition
system software that manages the hardware and provides a platform for running application software.
95
utility software definition
type of system software designed to help maintain, analyse, optimise, or protect a computer system.
96
functions of OS
user interface, memory management, process managment, file managment, device management, security
97
what would utility software do
firewall, degragmentation, compression, enctryptionm
98
why is utility software important
maintains systems performance, increases security, prevents data loss, efficient storage and operation
