The format of this file: source dest ron send1_time rec1_time send2_time rec2_time source: The originator of the probe dest: The destination to which the probe was sent ron: 0 = direct on the Internet 1 = latency optimized 2 = loss optimized RON path send1_time: The time immediately before sendto() on the source rec1_time: Time at which the packet was received on the interface at the destination send2_time: Time at which the packet was sent back to the sender by the destination rec2_time: Time at which the packet was received at source's interface If the *_time entry is NULL, it means the packet was lost before being received. No send_* entries should be null without the previous rec_* entry being null. Stats about this data: There are 3,058,547 individual samples. The data starts on 2001-05-07 18:02:47 and ends at 2001-05-11 12:18:44, for just under four days of samples. The one-way latencies are not accurate; the clocks on these machines were only roughly synchronized. Future datasets will aim to correct this. Bogosities in this data: The node at the University of Utah was having NFS problems that caused the RON node there to throw away packets. The RON-related data from this node is not valid, particularly where it comes to loss.