多项选择题
What are two major differences between MS-SPRing and SNCP？（）
A. In an MS-SPRing， all paths are protected.
B. MS-SPRing is always a high-order protection.
C. A low order circuit cannot be protected by an MS-SPRing.
D. There is no theoretical limit in the number of nodes in an SNCP ring.
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相关考题
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单项选择题
In order to avoid misconnections due to a failed node in an MS-SPRing， Alarm Indication Signals （AISs） are sent on every channel normally terminating in that node. What is the name of this process？（）
A. bridging
B. switching
C. squelching
D. nodal bypass
E. node failure insertion -
单项选择题
WhichtimingmodeisappropriateforanSDHNEthatisadjacenttoanSDHNEBits-1timing？（）
A. DUS
B. line timing
C. loop timing
D. internal timing
E. through timing -
多项选择题
WhichtwocanbetransportedinoneAU-4？（）
A. 3 E3
B. 4 E4
C. 64 E1
D. 21 E1 and 2 E3
E. 42 E1 and 2 E3
