Which interface performance metrics does NPM monitor and how is utilization calculated?

Which interface performance metrics does NPM monitor and how is utilization calculated?

• A. Monitors inbound/outbound traffic; utilization is a percentage of the interface speed; also tracks errors, discards, and utilization trends.
• B. Monitors only inbound traffic; utilization is absolute bps value.
• C. Monitors only interface errors; utilization derived from error rate.
• D. Monitors CPU usage to estimate interface utilization.

Answer: (A)

Measuring interface health in NPM centers on two things: how much traffic is moving through the interface in both directions, and how that traffic compares to the interface’s capacity. NPM monitors both inbound and outbound traffic, typically measured in bits per second or bytes per second. Utilization is calculated as a percentage of the interface speed, meaning for each direction (and often overall) you compare the observed traffic to the interface’s configured maximum speed and express the result as a percent. In addition to traffic, NPM also tracks errors and discards and can show utilization trends over time, which helps identify congestion or abnormal activity. This approach is why the other options don’t fit: traffic is not monitored in isolation or limited to inbound alone, utilization is not just an absolute bps value, utilization isn’t derived from error rates alone, and CPU usage is a separate metric not used to estimate interface utilization.

Measuring interface health in NPM centers on two things: how much traffic is moving through the interface in both directions, and how that traffic compares to the interface’s capacity. NPM monitors both inbound and outbound traffic, typically measured in bits per second or bytes per second. Utilization is calculated as a percentage of the interface speed, meaning for each direction (and often overall) you compare the observed traffic to the interface’s configured maximum speed and express the result as a percent. In addition to traffic, NPM also tracks errors and discards and can show utilization trends over time, which helps identify congestion or abnormal activity.

This approach is why the other options don’t fit: traffic is not monitored in isolation or limited to inbound alone, utilization is not just an absolute bps value, utilization isn’t derived from error rates alone, and CPU usage is a separate metric not used to estimate interface utilization.