Question: What is the purpose of the Namf_EventExposure_UnSubscribe request in the context of event exposure subscription?
Option 1: To subscribe to a new set of Event IDs
Option 2: To modify the notification endpoint of an existing subscription
Option 3: To request a change in the reporting type for an existing subscription
Option 4: To cancel a previous subscription by identifying the Subscription Correlation ID
Explanation: The Namf_EventExposure_UnSubscribe request is used to explicitly cancel a previous subscription. This is done by sending the request with the Subscription Correlation ID, which identifies the subscription to be cancelled.