Monitoring the bandwidth utilization is the best way to determine if the server can efficiently handle the current data traffic load. Bandwidth utilization provides insight into the amount of network capacity being used as a percentage of the total available, which directly impacts the ability to send and receive data. Latency measures delay, which is important but doesn't speak to traffic load capacity. CRC errors indicate issues with data transmission errors, which may affect performance, but don't reflect load handling capability. Temperature monitoring ensures the server operates within safe environmental conditions but is unrelated to data traffic capacity.