单项选择题
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？（）
A. 0 B. 1 C. 2 D. 3 E. 5
Whataretwocharacteristicsofdual-ringinterconnectinSDHne...
多项选择题What are two characteristics of dual-ring interconnect in SDH networks？ （）
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.
A customer would like to create a 1：1 protection group ...
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）
A customer has 20 E1s to add between far-end nodes in a...
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
