# Traffic identification categories

Situations categorized under Traffic Identification categories are generic situations used for identifying various details about network traffic, such as protocol versions, message types, browser versions (including identification for obsolete versions) and file types. These situations are useful for debugging or blocking specific traffic types. Inspection Engine uses these situations for file inspection and application identification purposes. These situations are not terminated in the inspection policy templates.

An exception to this are the “Packet Validity Situations” categories under Traffic Identification. These categories contain all packet validity situations that the engine generates, including threat related packet validity situations. For more information about the packet validity situations, see Knowledge Base article 36144 .

Note: The Logging setting for Content Identification cannot be changed to None (default value), otherwise the functionality of the inspection engine is compromised.