How many data categorization impact levels does the Department of Defense define and provide authorizations for?
The DoD offers authorizations for IL-2, IL-4, IL-5, and IL-6.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: How many data categorization impact levels does the Department of Defense define and provide authorizations for?
### Input: 
### Response: The DoD offers authorizations for IL-2, IL-4, IL-5, and IL-6.