How does NPM calculate capacity usage trends?

You receive traps from your network devices and want to alert on a select message. How do you accomplish this?

How can you quickly generate a report in NPM to show the top 50 interfaces by percent utilization?

How can you extend NPM's monitoring to non-standard devices?

You created a Universal Device Poller. You want to create an alert based on this custom poller. When you create the alert, you select "I want to alert on: Custom Poller." How would you identify the custom poller within the trigger condition?