Table 1. Criteria used to determine ping origins.

Interval Length	Description
0.26–0.29 s	Possible echos or multipath transmissions
0.30–0.70 s	Interval range between consecutive pings
0.71–1.50 s	Interval range between 1 or more skipped pings
1.50 s	Spurious pings or 3 or more skipped pings

*Ping origins deduced from intervals between consecutive pings.