Final answer:
The optional parameters when defining monitored inputs are blacklist, whitelist, wildcards, and disabled. Sourcetype can sometimes be optional. Host and index are usually predetermined but may also be set conditionally. The correct options are a and c.
Step-by-step explanation:
When defining monitored inputs, some parameters are mandatory while others are optional. The question asked specifically about which of the following are optional:
- Host
- Sourcetype
- Index
- Blacklist
- Whitelist
- Disabled
- Wildcards
In this context, you can configure monitored inputs with the required fields and have the flexibility to use or omit certain options based on your needs. Options such as blacklist, whitelist, and wildcards are typically used to refine what data is ingested by including or excluding specified patterns. The disabled option is used to enable or disable the input. Sourcetype is important for categorizing data, but can be provided later in some cases. Host and index are often predetermined based on where the data is coming from and where it should be stored, but they can also be set conditionally. By understanding the significance of each option, administrators can better manage data ingestion and indexing.