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Which of the following can be attached to EC2 Instances to store data.
A
Amazon Glacier
B
Amazon EBS Volumes
C
Amazon EBS Snapshots
D
Amazon SQS
Explanation:
Amazon EBS (Elastic Block Store) volumes are durable, block-level storage devices that can be attached to EC2 instances to store data. Here's why each option is correct or incorrect:
A. Amazon Glacier ❌ - This is an archival storage service for long-term data retention, not designed for direct attachment to EC2 instances
B. Amazon EBS Volumes ✅ - Correct answer. EBS volumes are specifically designed to be attached to EC2 instances as block storage devices for data that requires frequent updates
C. Amazon EBS Snapshots ❌ - These are point-in-time backups of EBS volumes, not storage devices that can be directly attached to instances
D. Amazon SQS ❌ - This is a message queuing service, not a storage service that can be attached to EC2 instances
Key Points:
EBS volumes provide persistent block storage for EC2 instances
They can be used as system drives or for database applications
Data persists independently of the instance lifecycle
Multiple EBS volumes can be attached to a single EC2 instance
Volumes are automatically replicated within their Availability Zone for durability