Computer Networking
What is the main reason the OSI model was created?

So application developers can change only one layer's protocols at a time.
To create a layered model larger than the DoD model.
So different networks could communicate.
So Cisco could use the model.

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Computer Networking
Bandlimited signal is

transmission of signals without modulation
simultaneous transmission of data to a number of stations
None of these
a signal all of whose energy is contained within a finite frequency range
All of these

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