Which is the CORRECT list for the three levels of a multi level Service Level Agreement(SLA)?

Technology is not a recognized ITIL SLA tier; the three standard levels are Corporate, Customer, and Service.

The Corporate level addresses generic service management topics that apply uniformly across all customers in the organization. The Customer level covers issues and targets specific to a particular customer group or business unit. The Service level defines targets for a specific service delivered to a specific customer, allowing each layer to be updated independently and avoiding repetition of common terms across individual agreements.

Technology incorrectly replaces Service as the third tier; Service is the correct designation for the lowest level of a multi-level SLA structure.

Neither User nor IT are standard ITIL SLA tier names; the correct structure uses Corporate, Customer, and Service.