单项选择题

Which is a legitimate bandwidth matched pair？（）

A. DS-1； E1
B. DS-1； STM-1
C. OC-3； STM-1
D. STS-1； STM-1
E. OC-192； STM-192

相关考题

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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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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.
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A. bridging
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单项选择题Which timing mode is appropriate for an SDH NE that is adjacent to an SDH NE Bits-1 timing？（）

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CCNP(642-321)

Which is a legitimate bandwidth matched pair？（）