Btec Digital Information Technology
Level 2 (GCSE)- Exam Component With
100% Correct And Verified Answers
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
Vendarsol
,- 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
Vendarsol
,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.
Vendarsol
, 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
Vendarsol
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Vendarsol. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $18.99. You're not tied to anything after your purchase.
