Q.

The path layer of SONET is responsible for the movement of a signal                    

A. from its optical source to its optical destination
B. across a physical line
C. across a physical section
D. back to its optical source
Answer» B. across a physical line
Explanation: the path layer in sonet is responsible for finding the path of the signal across the physical line to reach the optical destination. it is ideally expected to find the shortest and the most reliable path to the destination.
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