high latency destinations (HLD): definitions


consider RTT distributions in each cycle of probes
large diurnal variations in RTT values

RTT is high if above 90th percentile in given cycle (.5-1s)

a destination is high latency on a given day if it had:
         high RTTs in at least half the cycles on 
         all root server monitors

aggregate two 30-day long sets of data:
1 - 30 December 2000
6 March - 4 April 2001