Infrastructure as a service

Question 1

What are AWS Regions? Name an advantage. Is the communication between regions free?

Answer 1

A cluster of availability zones in different geographic locations.
Regions are isolated for fault tolerance and stability
Communication between regions is not free.

Question 2

What are AWS Availability zones?
Is the communication between availability zones free?

Answer 2

We can think about it like separated data centers.
Each regions can have multiple availability zones which are completely isolated.
Communication between AZ is not free, but in the same AZ it is free.

Question 3

Name the three levels of virtualization and explain each. Name an example if you know for each level

Answer 3

1.Bare metal: The hypervisor sits above the hardware and below the host OS/VMs (Xen hypervisor)
2.Hosted virtualization: The hypervisor sits on the Host OS
3.OS-level virtualization: Containers running on top of the OS Kernel.

Question 4

What does Amazon EC2 provides?

Answer 4

Amazon elastic cloud computing provides:
1. Virtual machines running inside the amazon cloud
2. Ephemeral storage for the virtual machines.
3. Virtual firewall.
4. Network accessible block.

Question 5

What is an amazon machine image?

Answer 5

Copy of server with a preinstalled OS. AMI is stored in s3

Question 6

What is EC2 VPC?

Answer 6

Virtual private cloud is a security platform for AWS.
It resembles your own network in the data center.