BTEC DIGITAL INFORMATION TECHNOLOGY LEVEL 2 (GCSE)-
EXAM COMPONENT WITH SOLUTIONS #12
Ad hoc Networks - correct answer - type of wireless network
- does not depend on cables
- provides organisations employees with internet outside the workplace
Open Wi-Fi - correct answer - available in public places
- provide Wi-Fi access to anyone
- may need to register or some require a network key
- unsecure
Network Key - correct answer - code, provided only to authorised network users
Tethering - correct answer - share internet connectivity with a device that doesn't have
internet access
Personal Hotspot - correct answer - simple to set up using smartphones tethering facility
- several devices can be tethered
- wireless, via bluetooth or USB cable
Benefits of Ad hoc Networks - correct answer - provide access to internet at all times in
most locations
- simple to set up
- allow users to work in places other than workplace
- open wifi- users connect to internet without using data
- personal Hotspots- provide internet to one more devices
Security Issues - correct answer - open Wi-Fi- no encryption- data sent and received not
secure so easily intercepted, if encrypted it is normally weak so easily hacked
- websites using https are normally secure but emails are sent in plain text so not
secure.
- Ad hoc networks- secure enough to send emails and use internet, less vulnerable to
eavesdropping, secure encryption keys should be used
Performance Issues - correct answer - tethering or personal hotspots- internet
connection is made via mobile data network. If several devices are tethered data
transfer will be slow.
- Public Wi-Fi- slow if lots of people are using it
- Ad hoc Network- limited range- any device using it needs to be close to Wi-Fi
transmitters (signal maybe weak, difficult to connect to or lose connection)
Network Availability Issues - correct answer - Blackspots- buildings, tunnels, geographic
feature- cause areas where network connection is poor or non-existent or block it all
together
,- Mobile Network coverage- high-speed networks are available in most cities but there
are other locations where signal doesn't reach. Differences between service providers.
- Available Infrastructure- streaming requires large amounts of data sent continuously
over the network. This places a strain on network infrastructure
- Developing countries- lack money to invest in network and difficulty managing
resources to set up advanced network
- Rural Areas- high cost to Install is coverage may be poor
Uses of cloud storage - correct answer - files, folders stored on remote servers (the
cloud)
- upload files from any device
- access files- can be downloaded from the cloud to the device(s)
- give user access to other users so they can access them to
Access Rights - correct answer - files stored in the cloud can be shared by employees
working in different locations
- user who creates file will control access rights- allow others to edit or only have read-
only access
- employees with access rights may require user name/password
Availability - correct answer - cloud storage accessed on any device, 24/7, any location
(with internet)
- providers may synchronise files so data is available even when user has no internet
Synchronisation - correct answer - store copies of files
- allows users to open files when internet is not available
- when user edits files system software synchronises files in the cloud to all devices
ensuring content is the same
- Organisations combine use of apps/files on their own systems/employees with
apps/files being stored on the cloud. Employees can work flexibly on different devices
both in/out workplace. For cloud and traditional systems to work smoothly apps/files
need to be synchronised regularly.
Scalability - correct answer - different users require different amounts of cloud storage
- users can rent additional space or reduce capacity
-SCALABILITY
Benefits of Cloud Storage - correct answer - access through any device with internet
connection
- some providers keep copies on users' device so accessible without internet
- 24/7/365
- access files wherever
- employees can work on files at the same time
- automatically synchronised across all devices
- store backups of a file so if device is damaged/lost, backups can be easily received
from remote servers
, - scalability- control costs, have the capacity which meets needs
- provider responsible for purchase, set up, maintenance of servers.
- users pay cost of storage space they rent
- providers may offer small amount of space for free
Drawbacks of Cloud Storage - correct answer - require you to have internet connection
- slow/poor internet connection- reduce speed of files being uploaded/downloaded
-delay in synchronisation if internet is slow/unavailable
- free amount of storage- often limited, more data stored more expensive
- users have no control over set up/management of servers their data is stored on.
- potential security issues
Online applications - correct answer - only the user using this device can access these
- cloud computing- range of applications, alternative way to access
- online applications run on remote servers in the cloud
- users can access/share applications using web-based server
Benefits of using cloud computing applications - correct answer - provider
maintains/updates- organisation not responsible for updating/maintaining software
- installation not required- saves technician time, local computers require less
processing/storage capacity- organisation can buy/rent less expensive machines
- cost effective- pays for service it requires and can scale up, software licenses not
required
- employees run the same version of software- consistency of file types/features,
access/use files created by others from any location with internet, less training/support.
File sharing - correct answer - online applications allow employees to work on a
document at the same time.
- colleagues can edit which can be seen (accepted/declined) by others
Collaboration tools - correct answer - comments- ask questions/make suggestions,
others can see and reply
- version history- see changes, who made them, restore previous versions of a
document
- chat (shared message boards/email)- allows chat in real time to discuss document
- suggested edits- show up as suggested changes rather than altering document,
review changes before agreeing and/or make further changes
- document sharing
- to-do lists- identify tasks, allocate them, scheduling software
- shared online calendar- arrange meetings, send email invitations
Access to cloud technologies - correct answer Different devices can all access cloud
technologies but with differing features will impact on:
- what cloud services able to access
- which services are suitable for which devices
EXAM COMPONENT WITH SOLUTIONS #12
Ad hoc Networks - correct answer - type of wireless network
- does not depend on cables
- provides organisations employees with internet outside the workplace
Open Wi-Fi - correct answer - available in public places
- provide Wi-Fi access to anyone
- may need to register or some require a network key
- unsecure
Network Key - correct answer - code, provided only to authorised network users
Tethering - correct answer - share internet connectivity with a device that doesn't have
internet access
Personal Hotspot - correct answer - simple to set up using smartphones tethering facility
- several devices can be tethered
- wireless, via bluetooth or USB cable
Benefits of Ad hoc Networks - correct answer - provide access to internet at all times in
most locations
- simple to set up
- allow users to work in places other than workplace
- open wifi- users connect to internet without using data
- personal Hotspots- provide internet to one more devices
Security Issues - correct answer - open Wi-Fi- no encryption- data sent and received not
secure so easily intercepted, if encrypted it is normally weak so easily hacked
- websites using https are normally secure but emails are sent in plain text so not
secure.
- Ad hoc networks- secure enough to send emails and use internet, less vulnerable to
eavesdropping, secure encryption keys should be used
Performance Issues - correct answer - tethering or personal hotspots- internet
connection is made via mobile data network. If several devices are tethered data
transfer will be slow.
- Public Wi-Fi- slow if lots of people are using it
- Ad hoc Network- limited range- any device using it needs to be close to Wi-Fi
transmitters (signal maybe weak, difficult to connect to or lose connection)
Network Availability Issues - correct answer - Blackspots- buildings, tunnels, geographic
feature- cause areas where network connection is poor or non-existent or block it all
together
,- Mobile Network coverage- high-speed networks are available in most cities but there
are other locations where signal doesn't reach. Differences between service providers.
- Available Infrastructure- streaming requires large amounts of data sent continuously
over the network. This places a strain on network infrastructure
- Developing countries- lack money to invest in network and difficulty managing
resources to set up advanced network
- Rural Areas- high cost to Install is coverage may be poor
Uses of cloud storage - correct answer - files, folders stored on remote servers (the
cloud)
- upload files from any device
- access files- can be downloaded from the cloud to the device(s)
- give user access to other users so they can access them to
Access Rights - correct answer - files stored in the cloud can be shared by employees
working in different locations
- user who creates file will control access rights- allow others to edit or only have read-
only access
- employees with access rights may require user name/password
Availability - correct answer - cloud storage accessed on any device, 24/7, any location
(with internet)
- providers may synchronise files so data is available even when user has no internet
Synchronisation - correct answer - store copies of files
- allows users to open files when internet is not available
- when user edits files system software synchronises files in the cloud to all devices
ensuring content is the same
- Organisations combine use of apps/files on their own systems/employees with
apps/files being stored on the cloud. Employees can work flexibly on different devices
both in/out workplace. For cloud and traditional systems to work smoothly apps/files
need to be synchronised regularly.
Scalability - correct answer - different users require different amounts of cloud storage
- users can rent additional space or reduce capacity
-SCALABILITY
Benefits of Cloud Storage - correct answer - access through any device with internet
connection
- some providers keep copies on users' device so accessible without internet
- 24/7/365
- access files wherever
- employees can work on files at the same time
- automatically synchronised across all devices
- store backups of a file so if device is damaged/lost, backups can be easily received
from remote servers
, - scalability- control costs, have the capacity which meets needs
- provider responsible for purchase, set up, maintenance of servers.
- users pay cost of storage space they rent
- providers may offer small amount of space for free
Drawbacks of Cloud Storage - correct answer - require you to have internet connection
- slow/poor internet connection- reduce speed of files being uploaded/downloaded
-delay in synchronisation if internet is slow/unavailable
- free amount of storage- often limited, more data stored more expensive
- users have no control over set up/management of servers their data is stored on.
- potential security issues
Online applications - correct answer - only the user using this device can access these
- cloud computing- range of applications, alternative way to access
- online applications run on remote servers in the cloud
- users can access/share applications using web-based server
Benefits of using cloud computing applications - correct answer - provider
maintains/updates- organisation not responsible for updating/maintaining software
- installation not required- saves technician time, local computers require less
processing/storage capacity- organisation can buy/rent less expensive machines
- cost effective- pays for service it requires and can scale up, software licenses not
required
- employees run the same version of software- consistency of file types/features,
access/use files created by others from any location with internet, less training/support.
File sharing - correct answer - online applications allow employees to work on a
document at the same time.
- colleagues can edit which can be seen (accepted/declined) by others
Collaboration tools - correct answer - comments- ask questions/make suggestions,
others can see and reply
- version history- see changes, who made them, restore previous versions of a
document
- chat (shared message boards/email)- allows chat in real time to discuss document
- suggested edits- show up as suggested changes rather than altering document,
review changes before agreeing and/or make further changes
- document sharing
- to-do lists- identify tasks, allocate them, scheduling software
- shared online calendar- arrange meetings, send email invitations
Access to cloud technologies - correct answer Different devices can all access cloud
technologies but with differing features will impact on:
- what cloud services able to access
- which services are suitable for which devices
