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Computer Networks
Sonet
Q
Automatic protection switching in linear network is defined at the _______
AA. Line layer
BB. Section layer
CC. Photonic layer
DD. Path layer
Correct Answer:
A. A. Line layer
Explanation:
The Line layer in SONET operates like the data link layer in the OSI model and it is responsible for the movement of signal across a physical line. The Synchronous Transport Signal Mux/Demux and Add/Drop Mux provide the Line layer functions.
