Computer Networking
Modulation is the process of

performing data encryption.
converting analog signals to digital signals
Multiplexing various signals into high speed line signals
converting digital signals to analog signals

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Computer Networking
In geosynchronous orbit, satellite

remains in a fixed position related to points on earth
remains in a fixed position so that as earth rotates, it can fully cover the earth
None of these
moves simultaneously
moves faster than the earth's rotation so that it can cover larger portion of earth.

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