Which of the following is a metadata field assigned to every event in Splunk?

In Splunk, every event has associated metadata fields that provide important context about the data being indexed. The "host" field is one of these key metadata fields. It specifies the name of the machine or device from which the event originated, making it crucial for identifying the source of data within a Splunk environment. This field helps users understand where their data comes from, which is particularly valuable when troubleshooting or analyzing events across diverse systems.

The other fields mentioned serve different purposes. For instance, "owner" is more related to permissions and the management of knowledge objects within Splunk rather than being assigned to every event. Similarly, "bytes" pertains to the size of the event data, which is calculated rather than inherently assigned as metadata, and "action" typically refers to specific user actions related to event manipulation or interaction, not directly as an event metadata field. Hence, "host" stands out as the correct choice since it is universally assigned to each event to aid in data categorization and analysis.