A Corporate Website Is Hosted on Several Amazon EC2 Instances

question 313

Multiple Choice

A corporate website is hosted on several Amazon EC2 instances across multiple regions around the globe. How should an Administrator configure the website to maintain high availability with minimal downtime if one of the regions has network connectivity congestion for an extended period of time?

• A) Create an Elastic Load Balancer in front of all the Amazon EC2 instances.
• B) Create an Elastic Load Balancer that fails over to the secondary site when the primary site is not reachable.
• C) Create an Amazon Route 53 Latency Based Routing Record Set that resolves to an Elastic Load Balancer in each region. Set an appropriate health check on each ELB.
• D) Create an Amazon Route 53 latency Based Routing Record Set that resolves to Elastic Load Balancers I each region and has the Evaluate Target Health flag set to "true".

---

Definitions:

Fixed Expenses

Regular expenses that do not vary in total over a wide range of activity levels.

Contribution Margin

The amount remaining from sales revenue after variable expenses have been deducted; indicates the contribution towards covering fixed expenses and generating profit.

Net Income

The income a company retains after deducting all costs, taxes, and expenses from its total revenue.

Discretionary Fixed Costs

Discretionary fixed costs are fixed expenses that can be adjusted or eliminated without directly impacting the short-term productivity of the business, such as advertising or research and development costs.