Karteikarten
ict revision
Karten in diesem Stapel (32)
- 1streaminglike downloading but the media file is played through a media player without being stored on the computer.
its like watching a film on TV, rather than on a DVD - 2podcastsa series of media files that are placed on a server as episodes
- 3LANLOCAL AREA NETWORKS
e.g offices and school
doesn't have to have a server
could be 2 or 3 computers linked together for sharing of files or software - 4WANWIDE AREA NETWORK
e.g employers working away from the firm's main site
NEED servers to operate the network
when computers that need to be connected together are in different places - 5advantages of using networksperipherals (e.g printers) can be shared amongst many different users
software can be shared
storing files centrally makes them less vulnerable to loss as result of workstation failure
communication across the network is fast and cheap - 6disadvatages of using networkscabling can be expensive to install and replace
a fault with the server can prevent the whole network from working
security measures are needed to restrict access to the network from working
viruses could disable the entire network - 7star networkused when a large number of workstations need to be connected to a central computer such as a mainframe or server
each workstation is connected directly to the central computer - 8pros of star networkpros :
performance in one part of the network is unaffected by events elsewhere
its easy to add more computers to the network - 9cons of star networkcons :
failure in the central computer causes the whole network to break down
uses a lot of cabling so its expensive - 10line / bus networkin line networks data is sent to and from the file server along a line of a cable
all terminals are connected to this central line - 11pros of line/bus networkpros:
cheap - because it uses less cabling - 12cons of line/bus networkcons:
with lots of users the system becomes very slow, as all data goes along a central line
failure of the central cable will bring the whole network down - 13ring networkring networks are a bit like line networks, except that all the equipment in linked in a ring
data flows around the network in one direction only - 14pros of ring networkpros:
cheap to expand
fast - as data flows in one direction only - 15cons of ring networkcons:
with lots of users the system becomes slower, as all the data is sent along a single line
failure of the ring cable brings the whole network down - 16encryption softwareonline shopping use encryption software to reduce the risk of credit card details being intercepted
- 17system life cyclehow you solve a problem
- 18phishingwhen people try to get user names, passwords, bank details etc by using a web page that looks official
- 19operating system(OS) - this is the software that controls the whole computer system, eg Windows R. the OS is responsible for running the other type of software (application software)
- 20application softwarethis means things like word proccessors, spreadsheets, games, and so on
- 21There are different types of operating systemall OSs have the same function - they talk to the various bits of a computer so applications and hardware can run properly. but there are different ways an OS can work
- 22interactive OSsallow the users to interact with programmes - they can alter the result of the program while its running. this is different to some older and specialised OSs, where programs run without allowing the user to affect the final outcome
- 23multi-tasking OSscan run many programs at the same time. that means that they have to share out resources such as the available memory and CPU time.
- 24multi-user OSsallow many people to log into a computer and use it at the same time. it has to do similar sharing of resources to a multi-tasking OS. it also has to keep track of multiple workspaces, so that each user has the same experience as the would using an individual computer
- 25real time OSsrun programs that need to react in a specific amount of time to events occurring in the outside world, e.g. the stock markets or the weather. it manages the computer's resources so that programs aren't interrupted, allowing them to meet the deadline for their responses
- 26online OSsstored on a computer server that doesn't belong to the user. users' files are also stored on the server. users log in to the OS from an internet-enabled computer- they can then use the OS as if it was on their own computer
- 27ISPinternet service providers... the companies that provide access to the internet are called ISPs
- 28plagiarismplagiarism is using someone else's work or ideas and pretending they are yours
- 29how to avoid committing plagiarismput ideas into your own words
quoting of text used
reference / bibliography
give credit/website address/acknowledge sources/cite - 30hot deskingused in offices, e.g call centres
staff don't have their own desk but are allocated a desk when they work
used for staff who work shifts.
means a business doesn't have to buy a computer for every member of staff just the amount of staff they have on shift at one time - 31teleworkingpeople can work from home but are still able to contact the office easily via telephone or email
- 32globalisationthe growth of ICT and technology has meant that businesses can now operate in the country they were set up in and all around the world.
Informationen
- Beschreibung
- GCSE ICT Karteikarten am ict revision, erstellt von Rachael Barton am 12/05/2017.
- Erstellt von
- Rachael Barton
- Aufrufe
- 0
- Bewertung