A client demands at least 99.99% uptime from a service provider's hosted security services. Which of the following documents includes the information the service provider should return to the client?

The correct answer is SLA. A Service Level Agreement (SLA) is a contract between a service provider and a client that defines the level of service expected from the provider. It specifies metrics like uptime, responsibilities, and penalties for non-compliance, directly addressing the client's demand for 99.99% uptime. An MOA (Memorandum of Agreement) is a cooperative agreement between two parties outlining their understanding and intentions, but it's less formal and detailed about service levels than an SLA. An SOW (Statement of Work) defines project-specific activities, deliverables, and timelines, but not ongoing service levels. An MOU (Memorandum of Understanding) is a preliminary agreement expressing mutual intent, similar to an MOA, but lacks the contractual specifics of an SLA regarding service performance.