The line capacity test measures the maximum capacity of a connection without the inherent overheads of TCP. The test is performed over a UDP connection and reports the maximum download and upload data transfer rates in conjunction with the packet to data ratios. The test profile is designed to answer the important question of ‘How much data can a connection sustain before data is lost?’. In addition, the packet to data ratio allows the test to highlight any packet level thresholds that affect the data throughput and data quality. The testing packet/data profile can be easily customized, allowing quick comparison tests to determine which configurations of packet size versus data volume deliver the best performance and quality of service. This ability to analyze connection throughput without inherent TCP window limitations is well-suited for pre-qualification testing, network provisioning, benchmarking and capacity testing.