1. Definition and Baseline A "pure 0.165 download" refers to a data transfer operation where the downstream throughput is precisely measured at 0.165 units per second (typically Megabits per second—Mbps—in modern networking contexts, though it could theoretically apply to any base unit: MB/s, Gb/s, etc.). The term "pure" indicates that this value represents the actual, sustained payload data rate , excluding all protocol overhead (TCP/IP headers, Ethernet framing, retransmissions, and encryption padding).
# Server side (listener) iperf3 -s -p 5201 iperf3 -c <server_ip> -p 5201 -R -t 60 -f m --omit 3 pure 0.165 download
| Aspect | Implication at 0.165 | |--------|----------------------| | No compression | Payload bytes = wire bytes. No gain from gzip or video encoding. | | No caching | Every byte is sourced fresh from origin; no local or proxy hits. | | No overhead subtraction | The measured 0.165 is application-layer throughput, not link-layer. | # Server side (listener) iperf3 -s -p 5201
Expect output similar to:
[ ID] Interval Transfer Bitrate [ 5] 0.00-60.00 sec 1.21 MBytes 0.165 Mbits/sec sender [ 5] 0.00-60.00 sec 1.21 MBytes 0.165 Mbits/sec receiver The 60‑second duration eliminates burst effects. Any deviation > ±2% indicates the flow is not "pure." | | No overhead subtraction | The measured 0