After starting the extended SSM protocol, in addition to determining the clock quality level and priority, the clock ID is also determined. After receiving the clock signal with the ID, the network element considers that the source is unavailable if it is judged to be the clock signal sent by the station. In this way, even after passing through multiple sites, the network element can still recognize the clock signal sent by itself, preventing the formation of a timing loop.

• A.FALSE
• B.TRUE

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The OD system monitors the main optical path performance in each optical multiplexing section (OMS),which of the following items are monitored?

• A.whether the optical power of the transmit-end OA board is out of the permitted range.
• B.whether a fiber cut occurs on the main optical path.
• C.whether the line loss compensation is out of the permitted range.
• D.whether the line loss exceeds the design end of life (EOL) value

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What common methods for MSTP device fault location can be summarized as?

• A.One board change, two loopbacks, three analysis.
• B.One loopbacks, two board change, three analysis.
• C.One analysis, two loopbacks, three board change.
• D.One analysis, two board change, three loopbacks.

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The OCh path is created using the single station method. After the creation is completed, the 0ch path is not searched. Which are the possible reasons? (Multiple choice)

• A.Missing logical fiber between sites
• B.Inconsistent wavelengths of the line boards at both ends of the source and sink
• C.errors in source and sink ports in the site
• D.Line attenuation is too large

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The protocols used in ASON are RSVP-TE, CSPF-TE, and LMP.

• A.False
• B.True

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