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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
参考答案
更多 “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” 相关考题
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单选题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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单选题A customer has 2 DS1s to add between adjacent nodes in a UPSR ring. What type of circuit should you recommend?（）A
VT circuitsB
STS circuitsC
VT tunnel circuitsD
1:1 protection circuitsE
1:N protection circuits
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CEF， distributed CEF （dCEF）， fast switching， process switchingB
distributed CEF （dCEF）， CEF， fast switching， process switchingC
fast switching， process switching， distributed CEF （dCEF）， CEFD
process switching， fast switching， distributed CEF （dCEF）， CEFE
process switching， distributed CEF （dCEF）， CEF， fast switchingF
process switching， CEF， distributed CEF （dCEF）， fast switching
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单选题What is the difference between 1+1 and 1：1 protection switching？（）A
1+1 is based on APS， while 1：1 is based on IPS.B
1：1 is used in SNCP switching， while 1+1 is used in MS-SPRing switching.C
1+1 sends signals on Working and Protect paths， while 1：1 sends signals only on Working path.D
1+1 sends signals on Working path ONLY， while 1：1 sends signals on both Working and Protect paths.
考题
单选题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
考题
单选题What is the correct relative switching priority in an MS-SPRing ring （higher to lower）？ （）A
signal fail， signal degrade， manual switchB
signal degrade， signal fail， manual switchC
protection lockout， manual switch， path AISD
forced switch， manual switch， signal degradeE
protection lockout， manual switch， forced switch
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