【多选题】As the Ezonexam network administrator, you are required to have a firm understanding of the OSI model. Why does the data communication industry use the layered OSI reference model? (Choose two)
A.
It enables equipment from different vendors to use the same electronic components, thus saving research and development funds
B.
It encourages industry standardization by defining what functions occur at each layer of the model
C.
It divides the network communication process into smaller and r components thus aiding component development, design and troubleshooting
D.
It provides a means by which changes in functionality in one layer require changes in other layers
E.
It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers
【简答题】With the open-access publishing model, the author of a paper is required to [A] cover the cost of its publication. [B] subscribe to the journal publishing it. [C] allow other online journals to use it...