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Comparison of Optical Fibres and Metallic Wires

Optical Fibre Metallic Wire
Not a lightning hazard as it is non conducting Can attract and transmit lightning
Lighter in weight Heavier in weight
Not affected by Interference Affected by interference
High data bandwidth Lower data bandwidth
Lower data loss Data loss is more
Faster data transmission Relatively slower data transmission
Unauthorised tapping of data is difficult Easier to tap data without authorization.
Difficult to terminate Easier to terminate
High initial cost Lower initial cost
Less affected by chemicals and pollution More prone to effects of pollution
No risk of sparking.  Hence, can be used in petroleum and chemical industries. Risk of sparking and fire.  Hence, cannot be used in hazardous environments.