The technology if compare to now and the past is such a great distance. My answer would be letter (C) because the computers in 1970 are not yet simplify and the circuits is still big that it would not fit in small box. Also the speed of calculation of each is not that fast
A(n) DFD is an excellent tool for representing a system's component processes and the flow of data among them.
Answer:
Yes they are to programmer
Explanation:
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A VPN. i believe what you’re referring to is called a vpn. it protects your data when you’re working online.