Operating System (OS)
A Processor

is a device that performs a sequence of operations specified by instructions in memory.
is a sequence of instructions
None of these
is the device where information is stored
is typically characterized by interactive processing and time of the CPU

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Operating System (OS)
Data encryption

None of these
is mostly used by public networks
is not necessary, since data cannot be intercepted
is mostly used by financial networks
cannot be used by private installations

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