Computer Networking
The main difference between synchronous and asynchronous transmission is

None of these
the pulse height is different.
the bandwidth required is different
the clocking is derived from the data in synchronous transmission
the clocking is mixed with the data in asynchronous transmission

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Computer Networking
In geosynchronous orbit, satellite

moves simultaneously
remains in a fixed position so that as earth rotates, it can fully cover the earth
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.

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Computer Networking
Contention is

a continuous frequency capable of being modulated or impressed with a second signal
a collection of interconnected functional units that provides a data communications service among stations attached to the network
the condition when two or more stations attempt to use the same channel at the same time
None of these
One or more conductors that serve as a common connection for a related group of devices

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