7429788
Beschreibung
Mindmap von Gladys Mba, aktualisiert more than 1 year ago
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Erstellt von Gladys Mba
vor fast 8 Jahre
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3f Optical
Communication
Methods
- Infrared
- Used with remote controls and with
laptops to communicate with
printers, mobiles and other laptops
- Use used most widely before bluetooth
- Needs direct line of sight
- Maximum distance of only 10m
- Cheap to implement
- Very restricted bandwidth 115.2kbps
- Used with remote controls and with
laptops to communicate with
printers, mobiles and other laptops
- Fibre Optic
- Speed of light
- Highest bandwidth of all optical communication methods
- Used in LANs when obver 100m needs to be coveredand WANs
- Low loss of signal and little interference.
- Loss of data is rare
- Loss of data is rare
- Can't be tapped like copper cables
- Expensive
- Splicing has to be used to fix it. Takes a long time
- Speed of light
- Lasers.
- Two lasers needed to send
data from and to each point
- No physical connection but
travels at speed of light
- Needs direct line of sight,
difficulties with moving objects
- Uses
- Aircraft to/from ground
- Live sporting events
- LAN between close buildings
- Military communication where real
time data is important
- Communication is space- beams
can travel thousands of miles
- Aircraft to/from ground
- Secure as they are very narrow and only
aimed from point to point
- Atmospheric conditions can cause
interference e.g storms / dust
- Two lasers needed to send
data from and to each point
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