A company has a single Amazon EC2 instance. The company wants to adopt a highly available architecture. What can the company do to meet this requirement?
A.
Scale vertically to a larger EC2 instance size.
B.
Scale horizontally across multiple Availability Zones.
C.
Purchase an EC2 Dedicated Instance.
D.
Change the EC2 instance family to a compute optimized instance.
There are two types of Scaling :
Vertical & Horizontal
Vertical -: Means increasing the configuration of the same existing machine
Horizontal -: Adding additional instances to share the work load, so answer her should be "B"
Agility.
Please refer : https://docs.aws.amazon.com/whitepapers/latest/aws-overview/six-advantages-of-cloud-computing.html
Increase speed and agility – In a cloud computing environment, new IT resources are only a click away, which means that you reduce the time to make those resources available to your developers from weeks to just minutes. This results in a dramatic increase in agility for the organization, since the cost and time it takes to experiment and develop is significantly lower.
Scaling horizontally across multiple Availability Zones allows for redundancy and fault tolerance. By deploying the EC2 instance in multiple Availability Zones, the company ensures that if one Availability Zone experiences an outage or failure, the application can continue running in another Availability Zone without interruption.
Please there is something I don't understand . is it possible to put one EC2 instance in a multiple availability? putting just one instance in us.west 1A and us west 1b . you can only scale one instance vertically by increasing the size of the Ec2 instance .
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