Multiple Choice Question (MCQ)

Question: How much copper contains in pyrites ore?
A. 0.15
B. 0.32
C. 0.5
D. 0.45
Correct Answer: 0.32
Explanation

OSI stands for Open Systems Interconnection. It has been developed by ISO – ‘International Organization for Standardization‘, in the year 1984. It is a 7 layer architecture with each layer having specific functionality to perform. All these 7 layers work collaboratively to transmit the data from one person to another across the globe.