- Customer-based, service-based, and multi-level
- Process, service, and technology
- Formal, informal, and draft
- SLA, OLA, and contracts
The correct answer is 1.
Customer-based, service-based and multi-level are the SLA types recognized by ITIL. Process, service and technology are the three types of metrics. Formal, informal and draft are not SLA types. SLA, OLA and contracts are the three types of agreements.
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