Which of the following describes a contract that is used to define the various levels of maintenance to be provided by an external business vendor in secure environment?

An NDA protects confidential information shared between parties but contains no provisions for defining service levels, maintenance schedules, or vendor performance obligations.

An MOU is a non-binding agreement expressing mutual intent and is not enforceable as a contract for specific maintenance obligations.

A BIA is an internal assessment tool used to identify critical processes and recovery priorities, not a contractual agreement with an external service provider.

A Service Level Agreement is a legally binding contract between a service provider and a customer that specifies measurable service commitments including maintenance schedules, response times, availability targets, and penalties for non-compliance. It is the standard instrument for holding external vendors accountable to defined performance standards in a secure environment. Its enforceable and quantifiable nature makes it the correct contract type for this scenario.