For SONET ring switching， the 50ms switch time： Select all that apply？（）A、Plncludes the detection timeB、Applies to rings smaller than 1200kmC、Applies to rings smaller than 1000kmD、Includes up to 16 nodes
For SONET ring switching， the 50ms switch time： Select all that apply？（）
- A、Plncludes the detection time
- B、Applies to rings smaller than 1200km
- C、Applies to rings smaller than 1000km
- D、Includes up to 16 nodes
相关考题：
UPSR protection switching is initiated by (), while BLSR is initiated by (). A. the K1 SONET byte； the K2 SONET byteB. the K2 SONET byte；the K1 SONET byteC. transmitter switching；receiver detectionD. Line Overhead bytes；Path Overhead bytesE. Path Overhead bytes；Line Overhead bytes
What are two characteristics of dual-ring interconnect in SONET networks? （）(Choose two.)A、It protects signals against node failures between rings.B、It protects signals against node failure within a single ring.C、It allows for traffic to be preempted when a ring switch occurs.D、Traffic can be dropped and continued at interconnecting nodes.E、It protects preemptible traffic from being dropped when a ring switch occurs.
On an ONS 15454 node you can tunnel a（n） （）.A、 SDH circuit over a SONET network delivering it as an SDH signalB、 SDH circuit over a SONET network delivering it as a SONET signalC、 SONET circuit over an SDH network delivering it as an SDH signalD、 SONET circuit over an SDH network delivering it as a SONET signal
UPSR protection switching is initiated by （）, while BLSR is initiated by （）.A、the K1 SONET byte； the K2 SONET byteB、the K2 SONET byte；the K1 SONET byteC、transmitter switching；receiver detectionD、Line Overhead bytes；Path Overhead bytesE、Path Overhead bytes；Line Overhead bytes
备锚，摇“备车”钟。（）A、Get anchor ready and ring “Stand by engine”.B、Get anchor ready and ring “Finished with engine”.C、Get mooring ready and ring “Stand by engine”.D、Get mooring ready and ring “Finished with engine”.
POS（PacketOverSONET/SDH，SONET/SDH上的分组）将长度固定的数据包直接映射进SONET同步载荷中，使用SONET物理层传输标准，提供了一种高速、可靠、点到点的数据连接。
On an ONS 15454 node you can tunnel an （）.A、SDH circuit over a SONET network delivering it as an SDH signalB、SDH circuit over a SONET network delivering it as a SONET signalC、SONET circuit over an SDH network delivering it as an SDH signalD、SONET circuit over an SDH network delivering it as a SONET signal
Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）A、DUSB、line timingC、loop timingD、internal timingE、through timing
单选题In large, low-speed, main propulsion diesel engine, position ring groove wear usually occurs at the（）Atop of the ring grooveBback of the ring grooveCbottom of the ring grooveDpiston ring end clearance
单选题A diesel engine piston ring face is in direct contact with the （）.Atop of the ring grooveBcylinder liner oil filmCbottom of the ring grooveDback of the ring groove
单选题On an ONS 15454 node you can tunnel a（n） （）.A SDH circuit over a SONET network delivering it as an SDH signalB SDH circuit over a SONET network delivering it as a SONET signalC SONET circuit over an SDH network delivering it as an SDH signalD SONET circuit over an SDH network delivering it as a SONET signal
单选题Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring（）AbackBsideCgapDbottom
多选题What are two characteristics of dual-ring interconnect in SONET networks? （）(Choose two.)AIt protects signals against node failures between rings.BIt protects signals against node failure within a single ring.CIt allows for traffic to be preempted when a ring switch occurs.DTraffic can be dropped and continued at interconnecting nodes.EIt protects preemptible traffic from being dropped when a ring switch occurs.
单选题Which timing mode is appropriate for a SONET NE that is adjacent to a SONET NE using BITS-1 timing source?（）ADUSBline timingCloop timingDinternal timingEthrough timing
单选题In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.Apiston crownBpiston ring grooveCpiston skirtDpiston ring area
单选题A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）AgapBsideCbackDradial
单选题UPSR protection switching is initiated by （）, while BLSR is initiated by （）.Athe K1 SONET byte； the K2 SONET byteBthe K2 SONET byte；the K1 SONET byteCtransmitter switching；receiver detectionDLine Overhead bytes；Path Overhead bytesEPath Overhead bytes；Line Overhead bytes
单选题On an ONS 15454 node you can tunnel an （）.ASDH circuit over a SONET network delivering it as an SDH signalBSDH circuit over a SONET network delivering it as a SONET signalCSONET circuit over an SDH network delivering it as an SDH signalDSONET circuit over an SDH network delivering it as a SONET signal
单选题What protection method is used in 4F BLSR networks?（）AEach fiber has half of its SONET capacity reserved for protection.BTwo fibers in the span carry working traffic, while the other two fibers in the span are reserved for protection.CThe signal is sent simultaneously in both directions around the ring. The receiver determines which fiber to listen to based on signal quality.DThe 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.
单选题On a ship，how many ring buoys are required to have a buoyant line attached?（）AOne ring life buoyBOne ring life buoy on each side of the shipCThree ring life buoysDTwo ring life buoys on each side of the ship
单选题If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）Aexcessive ring actionBexcessive ring temperatureCimproper ring rotationDexcessive ring face wear