QUESTION: 21

Which statement best describes phase synchronization as it is used in the backhaul transport?

The master and slave clocks cycle at a rate within 50 parts per billion (ppb)
The master and slave clock frames start within +/- 500 nanoseconds
The slave clock sets its clock frequency to the incoming bit rate
The slave sets its time and date accordingly to the arriving packet rate

Answer(s): B

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QUESTION: 22

Which command example correctly configures a 7750 Service Router (SR) for Synchronous Ethernet (SyncE) support?

configure card 1 mda 1 sync-e
configure card 1 ethernet sync-e
configure system sync-if-timing sync-e no shutdown
configure port 1/1/1 ethernet sync-e no shutdown

Answer(s): A

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Which component must you configure on an IEEE 1588v2/Precision Time Protocol (PTP) v2 slave to enable it to choose its master based on Synchronization Status Message (SSM) Option 1 or Option 2 Quality Levels?

Set the PTP port to the desired ITU-T G.781 Option 1 or 2 mode
Set the SROS IEEE 1588v2 profile to IEEE 1588-2008
Set the SROS IEEE 1588v2 profile to ITU-T G.8265.1
Configure ql-override on the PTP reference entry

Answer(s): C

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QUESTION: 24

Click on the exhibit.

Consider the topology and MLS1 configuration shown, and given the following conditions:
· MLS1 delivers the PRC traceable clock to the network · Reference 1 receives Quality Level (QL) - PRS
· Reference 2 receives QL - DUS
· BITS sets QL-STU
Which quality level will MLS1 deliver to POC2-1 on its Synchronous Ethernet (SyncE) port 1/2/7?

QL-DUS
QL-EEC2
QL-PRS
QL-STU

Answer(s): C

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QUESTION: 24