This is an in-depth summary of the network technologies module of the Computer Applications Technology IEB and CAPS syllabus, this includes terminology, definitions and network topologies
Features
Advantages of a network
Y canshareresources likePrintersand
:
4) Easy Communication between users
sharingofsoftwareand update,l location
interne s e e
Network technologies
Disadvantages of a network
4 can set
foldersordisableU
:
user
4 Need a lot
4
permissions
4 Viruses spread easily
Recquires good
ports
of knowledge
security.
such as
to
to draw
to specific
access
prevent theft of aa t the
up
server
Hardware
:
provides services and
①File Server
resources to computers in a network.
which sites may be visited , can monitor Usage of individuals ; does web
② Proxy server-controls eaching and saves data
4If the networks
down o e
③ E-mail server
controls all printers in a network / organisation .
① point servers.
- .
PAN : Personal Area network workstation/client : of services and resources provided by the server /Need an NIC to connect device
makes use
-
(fits on I table Switch :
Adevice that connects devices on the network , internally devices to each other .
Converts digital signals from your devices to signals thatmany
Types HAN-Home
are a network
Moder
cables :
:
UTP/Fibre Optic
can be sent over your internet connection .
umtestinal
12 or more rooms ( UTP (unshielded
Easy to install
Faithfailurewil
-
WAN easier
-
managing is work
↳ Wide Are a network intere are
4 fast data transfer astadorremorsea an a
nefreFibreveexpensiv -Ealy installationeachDifficulty
in ta
4 breaks very easily ther
GAN 4 HAN-Internet) .
.
-
No data traffic
4 The amount of -Less cables required -Notscalable as a b
↳ Global Area Network issues .
nodes to connect
point
wiresreavirea tem
I
WIFI Access With repeater
LAN internet/worldwide Is secure-point-to-
-
4 The which allows
device
tenthecoverageear
A is point
a wifdevice toconnect
(local area network) . . web
linkno unauthorized is tedious a
(more comp in one room) . fault detection is easy
-
.
OR Firewall :
↳ we can choose the 4 Fault detection is difficult
WLAN
Hardware/system software that prevents unauthorized topology based on the
(wireless local area network) to the network requirement 4 Installation is difficult
access from the internet
.
4 It is scalable as 4 Maintanance is 4 If the hub goes
we can further connect
expensive/nigh . 4 Less expensive
Easily add more
other computer networks . Easiertoinstall down everythinga
Securityrisan A high speed ; high-bandwidth
MuteSee
Broadband
Cubaa more resources ause
-
an
.
connection to the internet
UseupInternetda ,As amount of data that can be transferred from e
it is a central system
signal inteference/
Bandwidth-Thetotal
devices .
slower due to obstructions
like walls . Internet
ADSL-
)
↳
Asymmetrical Digital Subscriber Line
permanently connected Internet access service
Li scalable 4 large cabling
is required
4 On the failure of a
urb, the entire networ a
FTTH - Fibre to the home
Technologies 4 provides a fibre-cabled connection from a service provider to a home or business
Specifications
↳ Very difficult to configure.
4 Muchsimpler than 4 not useful for .
lot
throttled/unthrottled mesn/star
snaped/unshaped need
Usability of websites :
Cloud Computing
Services 4
InstantmessagingWhatsappisnapchat a b c
:
↳ Readability .
Di
World wide web
Internet browsing Features
4 Navigation .
4 Use
web
C runs
of programs
browsers
and is installed
through
on
↳ Grid computing
Use multiple
:
computer's processing power
of gmail . Com
4) consistency Internet servers instead
to solve 1 problem
file Transfer Protocol :
do main . of own local computer
web
Cache/proxy server cache 4 Lay out share of large files over a long distance
webmes eve
4
Stores aWe ae
Saas-Software service ;
a
as a
pay a monthly (annual fee and
through the internet
↳ Typography -
Localion Based Services /Look GGPS : geotagging InS1)
.
receive saas on the Web
n installation/updates
services that use the geographical position of
deviceto provide
4 No a contextual information a
to an existing computer program to customise the program .
Plug-ins (a software module that adds a special feature recquired
Adaw are
4 Proximity-based marketing
Browser Extension - > small software module that provides customisation for a web browser . Eg .
management
↳ Collaboration can occur
Internet searches Internet access recquired programs
Saminin
,
L updateregularlyarents See
/ Usually contain less features vs desktop version ;
need to pay
chatbots
photos/videos
-
↳ use .
Cloud storage :
software application that is used to carry out conversations using
Surface Web Deep Web Dark Web . Cryptocurrencies :
4 Information/files
a
text and voice commands .
Storing on
-
4 An Al power-driven software is mostly used by organisations
madeupofnon-indexedpagespartoftheinternetthat senes
Web Browser 1 Features :
part of the WNW that is i
Internet server .
Blockchain technology
: :
&
improve customer service
indexedbysearchengineath
to
4) Browser plug-in
4 Home button
by a search engine . A decentralised, distributed and public 4 Can access information from .
Internet Protocol
:
↳ intentionally hidden from
Voice Over
To seemultim aas a
Back/forward
engines.content includesanythinga lives
↳
Standard web search search engines ; uses masked IP anywhere as long as you have
addresses andis accessiba is
4 Favorite/Bookmark. ↳ cheaper than regular calls .
Quicktime . a sign-in credentials . internet connection .
networks 4 Can do video conference
Advantages
large peer-to-peer
↳Histor browsing egTOR across 4
Search Engine :
Can serve as backup for info . instead of travelling
.
4 Increased depth and thourro-
Advantages
guness of content not accesible
:
GooglesoftwarTew manywebpagan
see
by search engines
. 4 difficult to block information .
Like bitcoin , are a type of digital currency ↳ Synchronizes devices with ↳ Can make calls wherever
is available .
4
Yanooauser to sear a ↳ Address bar :
4 Deep web search engines
more efficient , retrieving
arehelpspeopletomaintaintheir that uses blockchain technology makinthe the same content Internet access
Available on different devices
on the www key-
higher quality more relevant
, views impossible to counterfeit or double spend . ↳ recquires Internet connection
for access to
4
words . data , 4 Video of
.
content usage can use a lot
perfectwayfor undercoverricate
you only get a small amount
web cache :
Webpages that have Disadvantages : of space for free no a at a
previously been visited are stored control over backup and security . ,
with each other 4 Disrupting if there is poor
on the local pC tenato besowertas Disadvantages Email > gmail ; icloud . internet connection .
4 The search string " slowed connection
) faster access in future
↳ needs to
Registration
be precise 4) Worst crime can be
:
for new sites/services done with email .
)
↳ saves
data ↳ Deep Commited A CAPTCHA is then also asked
web searchs may also to verify that it is a human
.
return sensitive personal
4 can be used to violate attempting the registration .
information privacy to others.
↳ risk of encountering illegal ,
harmful and criminal activity .
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