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Explain the two modes of long distanc...

Explain
the two modes of long distance communication.

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The two hasic modes of long distance communication are
(1) point-to-point or guided or line communication
(2) unguided or space communication, called broadcast.
Line communication is a transmission system in a fixed (land-hased) telecommunioation network that uses transmission Lines as a communication channel.
Space commumication is a transmission system in a fixed (land-based) as well as mobile (maritime, aeronautical abd land-based) telecommunications network that uses the physical space surrounding us as the communication channel. Space communication is via radio waves in certain internationally agreed frequency bands.
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