Question: What are the primary requirements for the communication network supporting wide-area power system protection in the context of preventing region-wide power outages?
Option 1: High bandwidth for video surveillance of power grids and medium latency tolerance (50 ms)
Option 2: Low to moderate end-to-end latencies (20 ms) and standard communication service availability (99%)
Option 3: Very low end-to-end latencies (≤5 ms) and extremely high communication service availability (≥99.9999%)
Option 4: High-capacity storage for historical power grid data and variable latency tolerance
Explanation: The correct answer reflects the critical nature of wide-area power system protection, which demands both very low end-to-end latencies (≤5 ms) to rapidly respond to disturbances and extremely high communication service availability (≥99.9999%) to ensure reliable operation of the power grid, thereby preventing widespread outages.