Final answer:
Reserved Instances on Amazon Web Services offer different purchase options, specifically Standard, Convertible, and Scheduled Reserved Instances, none of which include the acronyms provided in the question.
Step-by-step explanation:
For services such as Amazon Elastic Compute Cloud (Amazon EC2) and Amazon Relational Database Service (Amazon RDS), Amazon offers different options for purchasing Reserved Instances to allow users to reserve capacity and potentially save money versus using on-demand instances. The available options for Reserved Instances are:
Standard Reserved Instances (“SRI”): These provide a discount compared to on-demand pricing and are best for steady-state usage.
Convertible Reserved Instances (“CRI”): These allow users to change the attributes of the RI as long as the exchange results in the creation of Reserved Instances of equal or greater value.
Scheduled Reserved Instances (“SchRI”): These allow the user to reserve instances to launch within a specific time window that you schedule.
None of the options listed in the question - MURI, DURI, PURI, AURI, NURI - correspond to actual Reserved Instance offerings by Amazon Web Services.