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20580599
Connectivity
Descrição
mind map on connectivity --for test--
Sem etiquetas
computing
networks
test
computing
gcse
Mapa Mental por
Karishma Chhatwal
, atualizado more than 1 year ago
Mais
Menos
Criado por
Karishma Chhatwal
quase 5 anos atrás
36
0
0
Resumo de Recurso
Connectivity
Deep Sea Internet Cables
connected on land and under the ocean
Optical Fibres
Modern cables use optical fiber technology to carry digital data
Different colours show direction of flow
Good website to look into
http://www.submarinecablemap.com/#/
The most connected places are America and Europe , America and China
Bandwidth
The amount of data that can be carried at a time
Maximum rate of data transfer across a given path
Network Bandwidth
Data transfer capacity of a network
Data Bandwidth
Maximum data transfer rate of a network or internet connection
measures how much data can be sent over a specific connection in a given amount of time
Digital Bandwidth
number of pulses per second measured in bits per second (bps)
https://encyclopedia2.thefreedictionary.com/Digital+bandwidth
Anotações:
Good website to look into for extra info
Connection speed
The speed that data is transferred between your device and the internet
Download speed
Rate at which data is transferred from the internet to the user's computer
measured in megabytes per second(mbps)
More people download instead of uploading so downloading rate is quicker
Receiving speed
how quickly you can upload data
Medium
physical transmission medium
such as optical fibers
Presentation medium
Such as multimedia and advertising media
Storage medium
any technology including devices and materials and used to place,keep and retrieve electronic data
wireless connection
Advantages
easy to set up
cheap to buy
Mobility
link up devices
you can access it wherever you are
Disadvantages
Bandwidth
slow 54 mbps
poor security
lots of interference
walls/furniture
Buffer
an area of memory used for the temporary storage of data when a program or hardware device needs an uninterrupted flow of information
Ethernet cable
Ethernet networking standard uses twisted pair copper cabling or fiber optics
Fiber optic cables
Data travels through these at a speed of 299 792 458 m/s which is the speed of light
Expensive due to microscopic size
Copper cables
a lot of interference
cheap
can be used as average speed of broadband
The history of connectivity
the first cable was 2,500 miles long and was laid across the Atlantic in 1858 after many difficulties including storms and cable breakages
For each mile of cable 133 miles of copper and iron wire was needed
total weight was 1 ton per mile
broadband
high speed connection to the internet that has superseded the use of dial-up connection
fiber optic glass thread is used in modern cables,with up to 1,000 glass fibers in a single cable
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