Hey, welcome back to another post. I've been disconnected because I was pretty busy doing things, medical appointments and others.

So I continue my studying learning about EC2, AMIS and EBS. This topic is my current weakness because I failed the demo exam provides but I have exampro to practice this topic again.

EC2

It's a simple computer/server that Amazon provides to us. An EC2 instance has several parts and those are:

AMIS

An Amazon Machine Image provides the information required to launch an EC2 instance, which is a server in a cloud. In other words, it's an OS (Operative System), packages and another require stuff.

There we have 3 different types of AMIS:

1. Community AMIS:

   1. Free to use.
   2. With this AMIS you are selecting the OS that you want, It has a pre-setup

2. AWS Market place AMIS:

   1. Pay to use.
   2. It's licensed software.

3. My AMIS:

   1. AMIS created by yourself.

Instances type

This is the CPU that you want for your instance.
Here we have another config that is important when you are creating one instance type:

1. CPU: The number of virtual CPU's that you will need to use.
2. Memory: The amount of RAM that you need to your instance.
3. Storage: The instance storage volume, in other words, the HD (Hard drive)
4. Network Preference: Bandwidth capability, Security groups and other stuff related to networking.

EBS (Elastic Block Store)

It's a hard drive that will have our EC2 instance. provides persistent block storage volumes for use with Amazon EC2 instances in the AWS Cloud. Each Amazon EBS volume is automatically replicated within its Availability Zone to protect you from component failure, offering high availability and durability. Amazon EBS volumes offer the consistent and low-latency performance needed to run your workloads. With Amazon EBS, you can scale your usage up or down within minutes – all while paying a low price for only what you provision.

Security Groups

The security groups are very similar than NACL ( I talked about in the last post) Allow or deny traffic depending on the rules that you've provided.

There we have another configuration, I think that this topic wasn't cover in deep, In fact, as I mentioned above I fail the exam so I need to read more about.

So that's everything for today tomorrow I'll study about EC2 again, and I'm gonna try to move to S3 topic.

Thanks for reading, and enjoy learning.