Final answer:
The line in question likely pertains to a configuration file in Splunk, possibly the props.conf or transforms.conf files, which define data transformations including the anonymization of sensitive information like credit card numbers.
Step-by-step explanation:
The line TRANSFORMS-1ccnum = cc_num_anon you're referring to is likely found in a configuration file for a software application that performs data transformation or masking. This specific syntax is reminiscent of the Splunk software, which uses configuration files to define various settings.
In a Splunk setup, you might find this line in the props.conf or transforms.conf file, which are both used to specify how data is manipulated and interpreted for indexing. This particular line suggests that a transformation alias named 1ccnum is applied to anonymize or transform credit card number data, referenced as cc_num_anon elsewhere in the configuration.