A small company asks you to design a VDC in each of their two data centers, using stretched VLANs and native Fibre Channel extension to interconnect the environments. The data centers are located 30…

A small company asks you to design a VDC in each of their two data centers, using stretched VLANs and native Fibre Channel extension to interconnect the environments. The data centers are located 30 km apart. After inquiring with the local service providers, you find that only two strands of dark fiber are available. Which distance networking technology is the most appropriate?