Computer Networking
The channel in the data communication model can be

telephone lines
All of these
radio signals
None of these
postal mail service

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Computer Networking
In geosynchronous orbit, satellite

moves faster than the earth's rotation so that it can cover larger portion of earth.
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
moves simultaneously
None of these

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