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20580593
connectivity
Description
GCSE Computing Mind Map on connectivity, created by Angel Liu on 17/01/2020.
No tags specified
computing
gcse
Mind Map by
Angel Liu
, updated more than 1 year ago
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Created by
Angel Liu
over 4 years ago
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Resource summary
connectivity
deep sea cables
the most connections are in ammerica- europe and america-china
There are many connections beacause many similar interests and business
different colours show direction of flow
placed close to shore and shallow areas
bandwith
is also the amount of data that can be transmitted in a fixed amount of time
characterized as network bandwidth, data bandwidth, or digital bandwidth
connection speed
speed that data is transferred between your device and the internet
two types of connection speed
Download speed or receiving speed means the rate that information travels from the internet to your device
viewing a web page
downloading a program
or recieving an email
Upload speed or send speed means the rate that information travels from your device to the internet
sending an email
at school upload is higher than download
Broadband
broadband is wide bandwidth data transmission which transports multiple signals and traffic types
media used for connection
fibre optics
expensive
very expensive to install
delicate
a much greater bandwidth
coxial cable
advantages
sufficient frequency range to support multiple channels
disadvantages:
It is bulky.
It is expensive to install for longer distances due to its thickness and stiffness.
As single cable is used for signal transmission across the entire network, in case of failure in one cable the entire network will be do
Twisted pair
advantages
copper cables
cheap
not that fast
expensive
wireless
cheap because no cables
easy to set up
link devieces
access everything anywhere
less secure than cables
there may be interferences
slower
buffering
an area of memory used for temporary storage data when a program or hardware device needs an uninterrupted flow of information
quiz answers
internet providers give priority to downloading because most users spend more time downloading
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