Q. An STS-1 frame is made of ________ rows.

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Q. An STS-1 frame is made ______columns.

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Q. An STS-3 frame is made of ______ rows.

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Q. An STS-3 frame is made of ________ columns.

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Q. SONET network topologies can be __________.

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Q. A linear SONET network can be __________.

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Q. A ring SONET network can be _________.

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Q. To make SONET backward-compatible with the current hierarchy, its frame design includes a system of.

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Q. A ________ is a repeater.

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Q. __________ allow insertion and extraction of signals.

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Q. A _______ is the optical link connecting two neighbor devices.

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Q. A ______ is the portion of the network between two multiplexers.

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Q. A ______is the end-to-end portion of the network between two STS multiplexers.

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Q. The ______ layer is responsible for the movement of a signal from its optical source to its optical destination.

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Q. The ____ layer is responsible for the movement of a signal across a physical line.

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Q. The ______ layer is responsible for the movement of a signal across a physical section.

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Q. The _______ layer corresponds to the physical layer of the OSI model.

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Q. An STS multiplexer is a ______ device.

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Q. An add/drop multiplexer is a ______ device.

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Q. A regenerator is a ________ device.

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