An alert notification is a message that vRealize Operations sends to an external system or user when an alert is generated that meets certain criteria. An alert notification can help the administrator to identify and troubleshoot problems immediately after they occur. To enable alert notifications, the administrator must configure an outbound alert plug-in, which is a component that connects vRealize Operations to the external alert notification system, such as email, REST, SNMP, or log file. The administrator can also create notification rules, which are filters that specify which alerts are sent out for the supported outbound alert plug-ins1.

The other options are not accurate descriptions of the characteristics of an alert notification. Option A is incorrect because notifications are not configured out-of-the-box, but require the administrator to configure the outbound alert plug-in and the notification rules. Notifications also do not need to be explicitly enabled for each object discovered by vRealize Operations, but can be applied to multiple objects based on the notification rules1. Option B is incorrect because a SMTP Management pack is not required to enable email notifications, but the Standard Email plug-in, which is a built-in outbound alert plug-in that sends notifications to one or more email addresses2. Option C is incorrect because notifications are not configured as part of an alert’s symptom definition, but as a separate configuration that applies to one or more alerts. A symptom definition is a condition that indicates a potential problem with an object, and is used to trigger an alert, not a notification3.

References: 1: Creating and Managing vRealize Operations Alert Notifications - VMware Docs 2: Configure a Standard Email Notification in vRealize Operations 3: Symptom Definitions - VMware Docs