Which of the following is an open management standard specifically for storage?

SNMP (Simple Network Management Protocol) is a general-purpose protocol used for managing network devices and monitoring network performance, but it is not specific to storage management.

SLP (Service Location Protocol) is a protocol that allows computers and other devices to find services on a local area network without prior configuration, not a storage management standard.

SMI-S, or Storage Management Initiative Specification, is an industry standard from the Storage Networking Industry Association (SNIA) that defines a common interface for managing various storage devices from different vendors. Its primary purpose is to simplify the management of heterogeneous storage environments by providing a unified communication mechanism.

SMTP (Simple Mail Transfer Protocol) is an internet standard communication protocol for sending and receiving email.