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Which of the following statement is incorrect? | |
A. | The second layer of communication is the data-link layer [Wrong Answer] |
B. | Errors in the physical layer can be detected by the data link layer [Wrong Answer] |
C. | The fourth layer, in reference to the OSI model, is the session layer [Correct Answer] |
D. | The CCITT Recommendation X.25 specifies three layers of communication: physical, link and network [Wrong Answer] |