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Which is true regarding Enterprise Manager monitoring and configuration?

A.
Agents must be deployed on the- storage servers, in case all the database servers are down.

B.
Monitoring the power distribution units (PDUs) is done by Enterprise Manager agents, but
additional ethernet cables are required to connect the PDUs to the internal network switch in the
Database Machine

C.
Monitoring the power distribution units (PDUs) is done by Enterprise Manager agents without,
any additional network configuration.

D.
Agents may be deployed on the storage servers, in case all the database servers are down.

E.
Monitoring the power distribution units (PDUS) is done by Enterprise Manager agents but
additional ethernet cables are required to connect the PDUs to the corporate network switch.

Explanation:
Note:
*The following prerequisites must be met before you can deploy the plug-in:
Set and validate the preferred credentials on all Agents where you want to deploy the plug-in. This
is essential in order to deploy the plug-in.
The PDU firmware version must be 1.02 or later.
*This plug-in will be used to monitor PDU’s actual current value of Phase1, Phase2, and Phase3
and raises appropriate events if they have crossed the different threshold values. Each PDU will
have a plug-in instance added to its own OEM Grid Control agent.
By deploying the plug-in to your Grid Control environment, you gain the following management
features:
Monitor PDU targets.
Raise alerts and violations based on thresholds set on monitoring and configuration data.
Provide rich out-of-box metrics and reports based on the gather
Reference:Oracle Enterprise Manager System Monitoring Plug-In Installation Guide for Exadata
Power Distribution Unit

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