Which of the following principle is violated if computer system is not accessible

Which of the following principle is violated if computer system is not accessible?

यदि कंप्यूटर सिस्टम सुलभ नहीं है, तो निम्न में से किस सिद्धांत का उल्लंघन किया गया है?

Topic : Overview of Future Skills and Cyber Security