15.4 PC network Ping measures the round-trip time of messages. Ping at long distance is limited by data transfer at the finite speed of light. The world's longest telecom cable is 38,600 km between Europe and Asia. The glass fiber has a refractive index of 1.5. Find the minimum Ping in ms (millisecond) if data go through this whole cable length.

15.4 PC network Ping measures the round-trip time of messages. Ping at long distance is limited by data transfer at the finite speed of light. The world's longest telecom cable is 38,600 km between Europe and Asia. The glass fiber has a refractive index of 1.5. Find the minimum Ping in ms (millisecond) if data go through this whole cable length.