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How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs？（）

A. Traffic is switched from the first node receiving the AIS indication.

B. Traffic is switched from the far side of the failure, allowing handshaking to occur.

C. UPSR traffic is switched from the terminating node, BLSR traffic is rerouted from the originating node in the ring.

D. UPSR traffic is switched from the terminating node, circuit by circuit. BLSR traffic is rerouted from the last reachable node in the ring.

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更多“How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occ…”相关的问题

第1题

单向双纤WDM环采用（）保护。

A.BLSR/2

B.BLSR/4

C.UPSR

D.USRP

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第2题

UPSR protection switching is initiated by （）, while BLSR is initiated by （）.

A. the K1 SONET byte； the K2 SONET byte

B. the K2 SONET byte；the K1 SONET byte

C. transmitter switching；receiver detection

D. Line Overhead bytes；Path Overhead bytes

E. Path Overhead bytes；Line Overhead bytes

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第3题

Click the Exhibit button. A customer has several interconnected core rings （see exhibit).

Click the Exhibit button. A customer has several interconnected core rings (see exhibit). They want to create several irtual rings？utilizing their OC-192 backbone (nodes 1,2,3,4). What should you recommend？（）

Click the Exhibit button. A customer has several i

A. PPMN with BLSR rings

B. PPMN with UPSR rings

C. 1:N protection on all core circuits

D. multi-ring interconnect with BLSR rings

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第4题

You are provisioning a DS-1 circuit on an ONS 15454 UPSR configuration and XC-10G card. How many total VT ports are used within the VT matrix at the source node？（）

A.0

B.1

C.2

D.3

E.4

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第5题

A customer has 2 DS1s to add between adjacent nodes in a UPSR ring. What type of circuit should you recommend？（）

A. VT circuits

B. STS circuits

C. VT tunnel circuits

D. 1:1 protection circuits

E. 1:N protection circuits

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第6题

Why is an OC-3 2F-BLSR not feasible？（）

A. Switch times would exceed 50 ms for an OC-3 BLSR ring.

B. An equal amount of working and protect bandwidth is required.

C. DCC bandwidth is not large enough to handle K1/K2 processing.

D. There is not enough bandwidth in an OC-3 ring to justify BLSR protection.

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第7题

What is the correct relative switching priority in a BLSR ring （higher to lower)？（）

A. signal fail, signal degrade, manual switch

B. signal degrade, signal fail, manual switch

C. protection lockout, manual switch, path AIS

D. forced switch, manual switch, signal degrade

E. protection lockout, manual switch, forced switch

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第8题

In order to avoid misconnections due to a failed node in a Bidirectional Line Switched Rin

g (BLSR), Alarm Indication Signals (AISs) are sent on every channel normally terminating in that node. What is the name of this process？（）

A. trunking

B. squelching

C. nodal bypass

D. bridge and roll

E. node failure insertion

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第9题

Click the Exhibit button. Within an ONS 15454, you are provisioning a circuit on an unprotected UPSR ring. In the exhibit, which two must you configure？（）（Choose two.)

Click the Exhibit button. Within an ONS 15454, you

A. revertive

B. circuit type

C. circuit size

D. bidirectional

E. protected drops

F. switch on PDI-P

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第10题

What protection method is used in 4F BLSR networks？（）

A. Each fiber has half of its SONET capacity reserved for protection.

B. Two fibers in the span carry working traffic, while the other two fibers in the span are reserved for protection.

C. The signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.

D. The signal is sent simultaneously in both directions around the ring. The transmitter determines which fiber has the working bit set for the receiver to acknowledge.

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