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1753379
Network and Communication Part F
Description
A-Level A2- ICT (Chapter 3- Networks and Communications) Mind Map on Network and Communication Part F, created by Callum Douglas on 04/12/2014.
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a2- ict
chapter 3- networks and communications
a-level
Mind Map by
Callum Douglas
, updated more than 1 year ago
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Created by
Callum Douglas
over 9 years ago
35
2
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Resource summary
Network and Communication Part F
Infrared
Used for many things in life such as remotes and early laptops
These laptops used the infrared to communicate with other laptops/printer
Used by mobile phones to give them extra capabilities such as acting as an all in one remote
Main use of wireless communication before bluetooth
Requires direct line of sight and has to be close
Bandwidth is restricted to 115.2 Kbps
Requires little power
Cheap to implement for one-way communictations e.g remote controls
Fibre-Optic
These have the highest bandwidths of all of the optical communication methods
Used in LAN's for distances over 100m
These have a low loss of signal and no interference, this in turn results in a low loss of data packets
Can't be tapped so is more secure
Can be used to broadcast television and also internet services
The internet services are using fibre-optic cables to go to the cabinets and then the final connection is done with copper cables
It is expensive and damaged cables take ages to repair
If large sections of cable are damaged then it has to be broken and repaired which results in loss of connection to many homes
Laser
Have a clear line of sight between two devices
Travels the speed of light like fibre, but does not need any physical connection
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