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Conclusion PSAMP enables a wide spectrum of crucial network operations tasks basic statistics over entire traffic traffic matrices detailed observation of per-customer traffic troubleshooting of traffic flow through domain ... Both continuous and on-demand monitoring continuous, full sampling allows post-mortem analysis (e.g., of pop-pop matrix, per-customer traffic) on-demand measurements instantiated for higher precision Ubiquitous support for PSAMP enables superior operations for network operators good tradeoff simplicity-generality-overhead