Connection Analysis

This means that download throughput has been recorded lower than the attainable speed for the connection being tested and this degradation is not accounted for by the latency of the connection. This indicates that the connection has data flow interference through congestion or regulation problems.

A high TCP Max Delay and/or a low Data Flow QoS will also confirm any occurrence of data flow quality problems.

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Although the speed achieved may match expectation for the connection, a low data flow QoS score means that the data flow between the server and the workstation was not consistent. There can be several reasons for this such as data congestion along the route or data loss which invokes recovery. The lower the QoS percentage, the more erratic the data flow. Many applications can be severely affected by poor data flow quality regardless of data throughput speed, for example media applications such as video or voice may become jerky. Voice (VoIP) telephony will become garbled. If you suspect that the connection was in use by another application try running the test again to validate if the problem is persistent.

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The test recorded a TCP maximum delay that exceeded the natural TCP forced idle delay as a result of the connection's trip time. This indicates that there may be problems with consistent data flow between the server and the client. A poor data flow QoS reading is also likely if the max TCP delay is much higher in comparisons to the trip time. Common reasons for this type of problem are packet loss and duplicates. The test graph view will show the TCP delay over the time of the test. Height and width of the 'orange' delay line shows the delay consistency.

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