Final answer:
To address the CISO's concerns regarding the availability of critical company applications post-migration to a cloud provider, the company could implement a multicloud solution or a hybrid cloud solution, as both can enhance service availability.
Step-by-step explanation:
The company has successfully completed the migration of all datacenter servers and services to a cloud provider and is now concerned about the availability requirements of critical company applications. Considering the CISO's concern with availability, the best course of action would depend on the specific needs and constraints of the company, such as budget, regulatory requirements, and technical capabilities. However, generally speaking, to enhance availability:
- A multicloud solution (option A) could provide the needed availability by distributing services across multiple cloud providers. This reduces the risk of service disruption in case one cloud provider faces outages or other issues.
- A hybrid cloud solution (option C) could also enhance availability by allowing the company to use a combination of on-premises, private cloud, and public cloud services. This may be beneficial for certain sensitive or critical workloads that require additional control or if there is a need to meet specific compliance requirements.
A cloud access security broker (CASB) (option D) could help with security aspects, but it is not primarily focused on providing geographic service redundancy and may not directly influence service availability. Single-tenancy private cloud (option B) provides dedicated resources but may not inherently improve availability unless it is a part of a broader strategy, such as being one component of a hybrid or multicloud approach.