Delays etc.: ping, OWAMP, GPS
“Bandwidth”: iperf, pathload, pipechar, netest,
ABwE
Utilization: SNMP
Topology/tomography: traceroute, skitter, INCITE
Routing: RIPE, routeviews
Traffic characterization: netflow, NeTraMet,
tcpdump, coralreef
Visualization: MRTG, RRD, netgeo, geoplot,
tcptrace, xplot