A customer has 20 E1s to add between far-end nodes in a……

单项选择题Click the Exhibit button. As shown in the exhibit， a customer has several interconnected core rings. They want to create several irtual rings？utilizing their STM-64 backbone （nodes 1， 2， 3， and 4）.  What do you recommend？ （）

A. SNCP rings
B. MS-SPRing rings
C. 1：N protection on all core circuits
D. dual-ring interconnect with MS-SPRing rings

单项选择题A customer has 2 E1s to add between far-end nodes in an SNCP ring.  What type of circuit should you recommend？ （）

A. LO-PATH circuits
B. HO-PATH circuits
C. 1：1 protection circuits
D. 1：N protection circuits
E. LO-TUNNEL tunnel circuits

单项选择题WhatisthecorrectrelativeswitchingpriorityinanMS-SPRingring（highertolower）？（）

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

单项选择题WhatprotocolenablesEthernetoverSONET SDHencapsulationinteroperabilitybetweentheG-seriesandML-seriesEthernetcards？（）

A. LEX
B. HDLC
C. GFP-F
D. PPP/BCP

单项选择题You are provisioning an E-1 circuit on an ONS 15454 MS-SPRing configuration and XC-VXL-10G card. Each VC-12 connection must also terminate via the VC-3 matrix.  How many VC-3 ports remain after this circuit is created， assuming no other circuits？（）

A. 92
B. 93
C. 94
D. 95
E. 96