AutoSupport recently stopped working. No changes were made on the cluster itself. Which three factors outside of the cluster would cause the failure? (Choose three.)

AutoSupport needs to resolve hostnames (e.g., NetApp's AutoSupport servers) to IP addresses. Changes to DNS servers or records could prevent successful name resolution, thus failing AutoSupport delivery.

Firewall rules control outbound network access. If firewall rules were tightened or changed to block the ports/protocols (e.g., HTTPS, SMTP) used by AutoSupport for outbound communication, messages would not reach NetApp support.

AutoSupport itself does not typically use an Active Directory service account for its operation; it relies on network connectivity and its own internal mechanisms to send data.

Your NetApp support user ID is for accessing the NetApp Support Site or for customer-facing interactions, not for the internal functioning of the AutoSupport mechanism that sends messages from the cluster.

If the cluster is configured to use a proxy server for outbound communication, any changes to that proxy server's address, authentication, or availability would prevent AutoSupport from reaching its destination.