An administrator is responsible for setting up monitoring of multi-vendor SANs. Which protocol will allow for secure, threshold-based trap alerting?

SMS (Short Message Service) is a mobile text messaging service and is not a protocol used for SAN monitoring or trap alerting.

SNMPv3 (Simple Network Management Protocol version 3) is a standard protocol for network device monitoring and management, providing secure communication channels with authentication and encryption. It supports trap alerting, enabling administrators to receive notifications when predefined thresholds or events occur across multi-vendor SAN components.

SMI-S (Storage Management Initiative - Specification) is a standard for managing heterogeneous storage systems but focuses on unified management and discovery, not directly on secure, trap-based alerting itself.

SMTP (Simple Mail Transfer Protocol) is used for sending email and is not a protocol for real-time, threshold-based trap alerting from SAN devices.