The duration of the test Type of packets being sent Size of packets sent on network Number of packets sent on network What algorithm is used to space packets Time between test packets, in seconds (for periodic tests) IP version Type of service (IP precedence) Differentiated services code point IPv6 option for QoS Threshold used to distinguish between a large finite delay and loss Amount of test traffic Are bytes moving memory to memory or disk to disk* Size of TCP buffers used Reno, Vegas, HSTCP, ScalableTCP, etc Number of parallel streams Additional user-defined parameters Attributes that apply to all (or nearly all) parameters If "min", the parameter should be at least the given value; if "max", the parameter should be at most the given value; if "exact", the parameter should be exactly this value.