Which of the following is designed to be moved between EC2 instances to enable higher availability?

Which of the following is designed to be moved between EC2 instances to enable higher availability?

• A. Elastic Load Balancers
• B. Elastic IP addresses
• C. AWS CloudFormation templates
• D. Amazon EBS volumes

Answer: (B)

The design of Elastic IP addresses makes them a suitable choice for enabling higher availability by allowing easy reassignment between EC2 instances. An Elastic IP address is a static, public IPv4 address that can be associated with one EC2 instance at a time, but can be quickly remapped to another instance in the same region when necessary. This feature is particularly useful in scenarios where an EC2 instance fails or needs to be replaced, as it ensures that the endpoint remains consistent, minimizing downtime and the need for clients to update IP addresses. Using Elastic IP addresses helps maintain service continuity because the static nature of these addresses allows for quick recovery and failover strategies. If an instance goes down, the Elastic IP can be allocated quickly to a standby instance, ensuring that traffic can be redirected without changes needing to be made by end-users. Other options, while they play roles in high availability or resource management, do not provide the same level of flexibility for being moved between instances to maintain direct access and continuity of service in real-time.

The design of Elastic IP addresses makes them a suitable choice for enabling higher availability by allowing easy reassignment between EC2 instances. An Elastic IP address is a static, public IPv4 address that can be associated with one EC2 instance at a time, but can be quickly remapped to another instance in the same region when necessary. This feature is particularly useful in scenarios where an EC2 instance fails or needs to be replaced, as it ensures that the endpoint remains consistent, minimizing downtime and the need for clients to update IP addresses.

Using Elastic IP addresses helps maintain service continuity because the static nature of these addresses allows for quick recovery and failover strategies. If an instance goes down, the Elastic IP can be allocated quickly to a standby instance, ensuring that traffic can be redirected without changes needing to be made by end-users.

Other options, while they play roles in high availability or resource management, do not provide the same level of flexibility for being moved between instances to maintain direct access and continuity of service in real-time.