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Operating Systems Concepts - Engineering

Q1:

Data encryption

A is mostly used by public networks

B is mostly used by financial networks

C cannot be used by private installations

D is not necessary, since data cannot be intercepted

E None of the above

ANS:B - is mostly used by financial networks

The public network also is secured! Whatever chats mails and other stuff we do is work only with https encryption. PKI level encryption is ok for financial transactions but I think A must be the answer.