4A0-255 試験問題を無料オンラインアクセス

Which of the following statement about guaranteed restriction (GR) in generalized Multiprotocol labelSwitching (GMPLS) is correct?

• A.GR use reestablished backup LSPs with resources reserved and configured.
• B.GR calculates a new backup LSP every time a failure occurs.
• C.GR does not required the signaling of the fault to trigger the restoration.
• D.GR can achieve 100% survivability for a single-failure scenario only.

What does region coloring in GMPLS enable?

• A.Government level certification
• B.Administrative segregation
• C.Multi-layer network support
• D.Efficient spectral utilization

What is precision Time Protocol (PTP) designed for?

• A.Synchronization of encryption entities
• B.Packet-based timing distribution
• C.Precise time measurements
• D.Shortest path discovery

Which of the following statements about the Decision (HDEFC) decoding and soft decision FEC (SDFEC) decoding is FALSE?

• A.HDFEC provides a higher coding gain than SDEFC
• B.HDFEC uses fewer thresholds than SDEFC.
• C.HDFEC discards bits earlier in the decoding process than SDEFC.
• D.HDFEC injects less latency into the decoding process than SDFEC.

Which of the following is NOT a functionality provided by a coherent receiver?

• A.Demultiplexing
• B.Mixing
• C.Digital signal processing (DSP)
• D.Analog-to-digital conversion (ADC)