EC2 is a most widely used and one of the most AWS services that AWS provides.

Table of content:

• What is an EC2 instance.

• Why you need EC2 instance.

• What are different type of EC2 instance.

• Concepts of Regions and Availability zones.

What is EC2 instance?

• EC2 represents elastic compute cloud. Compute means, to provide a compute instance which is a combination of CPU, RAM and Disk.

• Elastic means which can be scale up and scale down, that means this service elastic in nature.

Why should i use an EC2 instance?

• Instead of creating virtual machines on hypervisor and managing them manually, it was very tough.

• One of the main advantage of using ec2 instance, it will be completely managed by AWS.

• Management effort and cost will reduce.

• You are going to pay only whatever you have used means pay as you go.

Different types of EC2 instance?

• There are 5 types of ec2 instance commonly used (Current Generation)

  - General Purpose EC2 instance.

  - Compute Optimised EC2 instance.

  - Memory Optimised EC2 instance.

  - Storage Optimised EC2 instance.

  - Accelerated Optimised EC2 instance.

What are the concepts of Region and Availability Zones?

• AWS has the Data Center across the world. e.g India, Europe, USA and multiple other places, so this is call Region in AWS.

• You can choose in which region you want to deploy your EC2 instance.

• Inside each region you have multiple availability zones.

As shown in image, we may have one of more than one Availability Zones inside the Region.