Define "field alias" in Splunk.

A field alias in Splunk is a mechanism that allows you to assign an alternative name to an existing field. This is particularly useful when you want to simplify queries or provide more context for the data being analyzed, without duplicating the actual field or its associated data. For instance, if you have a field named "src_ip" that contains source IP addresses, you might create a field alias called "source_ip" for easier reference in your searches.

Field aliases enhance the readability of your searches and reports by permitting the use of more intuitive names as opposed to the original field names, which may not always be self-explanatory. This flexibility is a key feature in Splunk that aids in making data interpretation more user-friendly.

In contrast, other options highlight aspects of Splunk that do not accurately define what a field alias is. Duplicating a field with a unique name does not capture the essence of a field alias, which does not create a new field but rather references an existing one. Similarly, summarizing data into categories or storing configuration settings doesn't relate to the function or use of field aliases in Splunk.