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Write two advantages and disadvantages of following :

(i)  Optical fibers

(ii)  Satellites

(iii)  Microwaves.

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Advantage :

Optical fibers Microwaves Satellites
It is guarantees secure transmission. Free from land acquisition rights.  Large area coverage of earth.
It is very high transmission capacity Ability to communicate over oceans.  Inexpensive compare to cable.

Disadvantage :

Optical fibers Microwaves Satellites
Expensive. Insecure Communication. Require high investment in case off failure. 
Hard to install. Limited bandwidth. Requires legal permissions

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