Why does the data communication industry use the layered OSI reference model?(Choose two)
A It divides the network communication process into smaller and simpler components ,
thus aiding component development ,design and troubleshooting.
B It enables equipment from different vendors to use the same electronic components , thus saving research and development funds.
C it supports the evolution of multiple competing standards, and thus provides business opportunities for equipment manufacturers.
D It encourages industry standardization by defining what functions occur at each layer of the model
E It provides a framework by which changes in functionality in one layer require changes in other layers.
Answer : A D
