How can i know which OIDs correspond to CPU Utilization, Used Memory, etc?

Question

Hi,

I am trying to monitor a small Digi ConnectPortX2 network using a Monitoring Platform (Zabbix), until know i have been able of getting the OIDs from my ConnectPortX2 using 'snmpwalk' command, but once i receive a lot of OIDs i have no idea which is the one than corresponds to:
- CPU Utilization
- Used Memory
- Used Flash Filesystem

There should be an OID for each one of this status? Right?

Hope someone could point me in the right direction.

Thanks!