You are provisioning an E-1 circuit on an ONS 15454 SNCP configuration and XC-VXL-10G card.
 How many total ports are used within the Low-Order matrix at the source node？（）

多项选择题Whataretwocharacteristicsofdual-ringinterconnectinSDHnetworks？（）

A. It protects signals against node failures between rings.
B. It protects signals against node failure within a single ring.
C. It allows for traffic to be preempted when a ring switch occurs.
D. Traffic can be dropped and continued at interconnecting nodes.
E. It protects preemptible traffic from being dropped when a ring switch occurs.

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

A. only Slots 6 or 12
B. only Slots 3 or 15
C. high or low speed slots
D. directly adjacent to the working card
E. high-speed slots only （5/6 and 12/13）

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