What type of information is classified to restrict access only to approved persons?

The classification of information that restricts access only to approved persons is referred to as "Confidential." This type of classification is used to protect sensitive information that, if disclosed, could potentially harm individuals or organizations.

Confidential information is accessible only to individuals who have been granted the appropriate clearance or authorization, ensuring a controlled environment where sensitive data is safeguarded from unauthorized access. This category typically includes business secrets, personal data, financial information, and other data considered sensitive.

The other classifications, while they play essential roles in information security, do not reflect this specific level of protective restriction. For example, "Unclassified" refers to information deemed suitable for public dissemination with no access restrictions, while "Data Tag" is not a standard classification but rather a term used in context with labeling data for various purposes. "Secret" is a higher classification level, indicating that the information is significantly more sensitive and restricted than confidential information, which may not align with all situations where "Confidential" would be the correct categorization.