Limit abusers' bandwidth when using unwanted protocols, like BitTorrent or P2P.
Give different users and/or groups different bandwidth usage rights.
Give important servers and services bandwidth reservations.
Track and monitor bandwidth usage and bandwidth abusers.
Troubleshoot bandwidth-related network slow-downs.
Assign per-user, per-site, and per-application quotas.
Guarantee Network bandwidth for users and/or applications.
Limit hosts to certain hourly/daily/weekly bandwidth quotas.
Punish unauthorized network usage attempts by rate-limiting network connections for users that violate Acceptable Usage Policies