Computer Networking
In geosynchronous orbit, satellite

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

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Computer Networking
The physical layer, in reference to the OSI model, defines

the interface between the X.25 network and packet mode device
All of these
None of these
the virtual circuit interface to packet-switched service
data link procedures that provide for the exchange of data via frames that can be sent and received

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