Which two of the following troubleshooting steps can be performed when a node is “up”...

Ping the device from the polling engine: Verifies network connectivity and correct polling engine assignment.

Verify hardware health sensors: Ensures the platform is receiving valid sensor data; missing data may indicate sensor or device communication issues.

Adding a remote site node and waiting are not direct troubleshooting steps for missing data on a node that is already “up.”

Exact Extract from Official Guide:

“If a node is up but data is missing, check network connectivity from the polling engine using ping or SNMP walk tools, and verify that hardware health sensors are reporting valid data.”

— (Network Performance Monitor Administrator Guide, “Troubleshooting Nodes and Data Collection” section)