A customer would like to create a 1：1 protection group with a DS3Ni-12 card. 
Where should it be placed in the chassis？（）

单项选择题A customer has 20 E1s to add between far-end nodes in an SNCP ring.  What type of circuit would you recommend？（）

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

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