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

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

单项选择题Whatisthedifferencebetween1+1and1：1protectionswitching？（）

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.

单项选择题WithR4.0，howmanytotalDCC-RtunnelconnectionscaneachONS15454supportusingtheTCC+card？（）

A. 10
B. 32
C. 64
D. 84
E. 96