Online Access Free 4A0-255 Practice Test

Consider the exhibit that shows the OTN frame structure . Which of the following sets of label is correct?

• A.ODU: B: OYU: C: OPU: D: OPU
• B.OUT: B: ODU: C: OPU: D: OPU
• C.OUT: B: ODU: C: OPU: D: OCH
• D.OPU: B: OTU: C: ODU: D: OPU

Where is guardbandmandatoryfor EMF?

• A.Between 10G and 200G channels
• B.Between 10G and 40G channels
• C.Between 40G and 100G channels
• D.Between 10G and 100G channels

Consider the exhibit. The grey sites (Site 1 through Site6) from an existing network, which will be extended by adding Site7 and Site8. Which of the following is NOT a common source of interoperability issues for this network extension?

• A.Regeneration requirements at Site5
• B.Cascading in the existing network
• C.Spectrum grid of the extension
• D.Fiber connectors at Site6

Which of the following is recommended to reduce the latency of a 30km long link?

• A.DCM-free amplifiers
• B.Soft-decision FEC
• C.L1 encryption
• D.Low-noise amplifiers

What does an OPU tributary slot contain, when multiplexing OTN frames?

• A.An OUT.
• B.An ODU.
• C.An OPU.
• D.An OH byte