optical media ANS:better known as music and film storage formats, CDs and DVDs are methods of digital information and data storage that can hold information of many types. one of the key uses 8is for software distribution. called optical media because they are written and read by laser.
paper ANS:...
optical media ANS:better known as music and film storage formats, CDs and DVDs are methods of digital
information and data storage that can hold information of many types. one of the key uses 8is for
software distribution. called optical media because they are written and read by laser.
paper ANS:a traditional form of information storage and includes forms, handwritten notes, maps and
telephone directories. however, it is easily damaged when handles, costs a lot to transport and can be
hard to keep secure.
magnetic media ANS:uses magnetic patterns to store data. the most common example is the magnetic
hard drive inside most computers. data can be stored on external hard drives. data can also be stored on
tapes. this data is most frequently used for back up or archiving.
solid state media ANS:stores data and information in circuitry rather than a magnetized disk or tape. an
example is an SSD card, these are increasingly popular because of their speed. SSD cards can also be
used in computers in place of hard drives, where they have the advantage of not requiring air cooling, as
the lack of moving parts means that they do not overheat.
characteristics of storage media ANS:mutability (the ability to change the content of a storage medium)
robustness
access to data
cost
storage capacity
handheld device ANS:smaller portable devices that can either be handheld or worn. examples include
smartphones (mobile phones which include aspects of computer functionality, including internet
access), smart watches, eBook readers and small tablets.
portable devices ANS:can be easily transported. laptops are computers that only differ from desktop
machines because of their portability, while tablet devices are as portable as laptops, but typically have
less processing power.
fixed devices ANS:not designed to be portable. including desktop computers, which may be considered
the traditional form of computer, smart TVs which are televisions that include aspects of computer
functionality, and games consoles which are specialized computers designed primarily for playing
games.
, shared devices ANS:may be accessed by more than one user at a time. for example a database server is
a computer that runs and provides database servers for other computers. data centers are usually
commercial operations that provide access to the internet and non-stop internet presence for clients
who would otherwise not be able to afford it. while cloud storage devices (e.g. drop box), allow users to
store data and information remotely on the internet.
characteristics of information storage ANS:processing power- the amount of calculations that can be
completed in a fixed period of time.
versatility- the ability of a device to complete different tasks.
storage capacity- the amount of data that can be stored on the device.
internet ANS:worldwide network of interconnected networks (public, open access).
intranet ANS:a network that is not connected to the internet and is only available to those within an
organization. they hold information needed by those who are inside the organisation, but is not
intended for wider distribution (private, closed access).
extranet ANS:a website that provides restricted access to resources for an authorized set of users from
outside the organization (private, shared access).
web pages ANS:the fundamental information format on the internet. must be static, which means they
remain constant unless edited by an author, or dynamic, which means that the webpage is built afresh
whenever loaded, based on criteria set by the web server. this means that, theoretically, the web page
could appear differently to a user or different users every time it is opened.
blogs ANS:originally personal web pages on which the owner comments on aspects of their own lives. to
some extent, these were online diaries. more recently there has been a rise in themed blogs where
individuals report on areas of interest such as fashion, literature and politics.
are now being used by organizations to demonstrate their expertise by passing on content and
information to its followers.
podcasts ANS:can be a sound file or a sound and video file that can either be downloaded onto a device
or played online. comes in chunks or episodes. true podcasts are usually created as stand-alone
presentations in their own right, and are not based on material that may have already been presented in
other formats, and are often made as part of a series. however, some radio programs are also converted
into a 'best bits' podcast, or made available as a whole program after it has been broadcasted.
streamed audio and video ANS:relatively new feature on the internet, and due to high bandwidth
required to stream such new features, as they would appear on more traditional features, have come
about as networking and processing technologies have improved.
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