D. AWS provides the infrastructure and services (like EC2) that include a range of Amazon Machine Images (AMIs) with pre-installed operating systems. This means AWS is responsible for ensuring that these AMIs are available and that the underlying infrastructure to run these instances is secure and reliable.
The other responsibilities listed - database backups (A), database software patches (B), and operating system patches (C) - are under the purview of the customer when using Amazon EC2 instances.
A. Database backups - Customer responsibility. Customers are responsible for managing and maintaining backups of their data. AWS provides tools and services, but it's up to the customer to implement and manage backup strategies for their databases.
B. Database software patches - Customer responsibility. The customer is responsible for applying patches and updates to the database software running on their EC2 instances. This includes managing the software lifecycle, updates, and security patches.
C. Operating system patches - Customer responsibility. Similar to database software patches, the customer is responsible for applying patches and updates to the operating system of the EC2 instances. AWS manages the infrastructure, but the customer is responsible for the configuration and maintenance of their instance's operating systems.
D. Operating system installations - AWS responsibility. AWS takes care of installing and maintaining the operating system on the EC2 instances. This is part of the underlying infrastructure managed by AWS as a cloud service provider.
C. Operating system patches
The customer is responsible for managing the operating system, including applying patches, while AWS manages the underlying infrastructure. The other options (A, B, and D) are also the customer's responsibility.
Operating system patches
AWS is responsible for the hypervisor and the physical infrastructure (such as the servers, storage, and networking), but the customer is responsible for managing the operating system and software on their EC2 instances.
D. Operating system installations - AWS responsibility. AWS takes care of installing and maintaining the operating system on the EC2 instances. This is part of the underlying infrastructure managed by AWS as a cloud service provider.
The correct answer is:
C. Operating system patches
Explanation:
When a company hosts its databases on Amazon EC2 instances, it falls under the "Infrastructure as a Service" (IaaS) model. AWS is responsible for maintaining the underlying infrastructure, such as:
Physical hardware
Networking
Virtualization
However, the management of the EC2 instance itself, including:
Installing the operating system
Patching the operating system
Managing the database software
Configuring and backing up the database
is the responsibility of the customer. Therefore, AWS handles operating system patches, as it is part of the shared responsibility model related to infrastructure-level management.
AWS provides AMIs (Amazon Machine Images) with pre-installed operating systems, but the customer selects and launches the EC2 instance.
AWS handles operating system patches as part of its infrastructure management, but customers are responsible for managing and maintaining the databases they host on EC2.
Hence, C is the correct answer.
Why not the others?
A. Database backups: The customer manages backups for databases hosted on EC2.
B. Database software patches: Customers are responsible for patching the database software they install on EC2.
D. Operating system installations: Customers choose and install their preferred operating systems on EC2 instances unless they use pre-configured AMIs.
Why the other options are incorrect:
A. Database backups: This is the customer's responsibility unless they use a fully managed service like Amazon RDS, which handles backups automatically.
B. Database software patches: Customers are responsible for applying patches and updates to the database software running on EC2 instances.
D. Operating system installations: Customers are responsible for selecting and installing the operating system on their EC2 instances, even though AWS provides AMIs that can simplify this process.
C is wrong.
The customer is responsible for operating-system patches and updates on EC2 Instances, as well as data security on the instances, Security Groups rules, etc.
C. Operating system patches
AWS is responsible for the infrastructure, which includes maintaining and patching the underlying hardware and the hypervisor, as well as providing patches and updates for the operating system if the company is using an Amazon-managed AMI (Amazon Machine Image) for the EC2 instance.
The customer is responsible for database backups, database software patches, and operating system installations (if they are not using a managed service like Amazon RDS, which handles more of these responsibilities).
D. AWS provides the infrastructure and services (like EC2) that include a range of Amazon Machine Images (AMIs) with pre-installed operating systems. This means AWS is responsible for ensuring that these AMIs are available and that the underlying infrastructure to run these instances is secure and reliable.
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