1721600
Descrição
Mapa Mental por natalieponci01, atualizado more than 1 year ago
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Criado por natalieponci01
quase 10 anos atrás
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Computing
- Databases
- Enables the effective storage of data in a structured and logical way
- Can be computerised od paper-based
- used to describle any collection of data
- large collection of data items and links
between them which are structured in a way
that allows it to be accessed by a number of
different applications
- Enables the effective storage of data in a structured and logical way
- HTML
- Hyper Text Markup Language
- File containing text that uses tags to say how it should be displayed
- Includes the location of the URL of
other elements like images, sounds
and videos to be included as well as
hyperlinks to other web pages.
- Made out of up of a series of tags that tell the
web browser how to display the text and
image on a web page
- Hyper Text Markup Language
- Networks
- LAN
- Local Area Network
- Network of computers connected in a limited area
- usually the same building or
nearby buildings
- High speed
- Network of computers connected in a limited area
- Local Area Network
- WAN
- Wide Area Network
- Joins computers
together over a long
distance
- Can be joined using
oublic telephones, fibre
optic cables, or satellites
etc
- Built for a particular company but they are private
- Wide Area Network
- Bus
- Set of wires which transfer
data or power between
components inside the
computer
- A bus cannot connect peripherals together
- BUS CLOCK: while the CPU is busy cycling
throughits, program, data is being moved
around the computer by means of data
buses
- Each of these buses are also running with their
own clocks, each time the clock 'pulses' a data
transfer can take place.
- Each of these buses are also running with their
own clocks, each time the clock 'pulses' a data
transfer can take place.
- Set of wires which transfer
data or power between
components inside the
computer
- Star Network
- Type of network arrangement where each
computed is linked to a central server on a
dedicated line
- Arrangement looks like a star with one server in the middle
and all the computers surrounding it with one connection
- Advantage: each lunk to the server is independent of the
other computers so the comouter do not have to share
bandwidth with eachother
- Disadvantage: more cabell]ng is needed + if the
central server is borken the whole system is broken
- Type of network arrangement where each
computed is linked to a central server on a
dedicated line
- Ring Network
- Where one computer is
linked to the next and
the last computer is
linked to the firstn
forming a ring shaped
network
- Simple to set up
- useful for small office networks
- if one of the links is broken
then one side of the
cmputers break can't
communiate with the other
side
- Where one computer is
linked to the next and
the last computer is
linked to the firstn
forming a ring shaped
network
- LAN
- Types of software
- Custom Written software: created specifically
for the user, it is expensive ( as you have to pay
someone to make it) but is often used when the
application is very specific or unique so no
alternative software is availiable
- Off the shelf software: suitable for a wide
range of users (like a work processor) it is
cheaper than Bespoke software and
availiable instantly but will come with lots
of functionality you dont need and not
everything you like
- Open source software: has a source code
open to the public, so anyone can add new
features to improve the existing code. It is
usually free and created by a huge
community of programmers who can
distribute their own version of the program.
- Proprietary Software:
created by companies
and sold for profit,
users cant get access to
the source code and
must wait for the
company tofix any
bugs.
- Custom Written software: created specifically
for the user, it is expensive ( as you have to pay
someone to make it) but is often used when the
application is very specific or unique so no
alternative software is availiable
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