Skip to Content

Getting Started with Compute: AWS EC2 Instance Architecture Explained

By: Author Alex Lim

Posted on

Categories Cloud Computing

Learn about the correct architecture of an Amazon EC2 instance and how it is placed within a subnet, VPC, security group, and AWS Region. Master the AWS infrastructure for your cloud computing needs.

Table of Contents

Question

Which statement is correct about the architecture of an EC2 instance?

A. The instance is placed within a subnet, within a security group, within a virtual private cloud (VPC), and within a Region.
B. The instance is placed within a virtual private cloud (VPC), within a security group, within a subnet, and within a Region.
C. The instance is placed within a security group, within a subnet, within a virtual private cloud (VPC), and within a Region.
D. The instance is placed within a security group, within a subnet, within a Region, and within a virtual
private cloud (VPC).

Answer

C. The instance is placed within a security group, within a subnet, within a virtual private cloud (VPC), and within a Region.

Explanation

The architecture of an EC2 instance is that it is placed within a security group, within a subnet, within a VPC, and within a Region.

Here’s a detailed explanation of the EC2 instance architecture:

  1. Security Group: An EC2 instance is first placed within a security group. A security group acts as a virtual firewall that controls inbound and outbound traffic at the instance level. It defines which traffic is allowed to reach or leave the instance based on IP addresses, protocols, and port numbers.
  2. Subnet: The instance, along with its associated security group, is then placed within a subnet. A subnet is a range of IP addresses within a VPC. It allows you to partition your VPC into smaller networks, enabling better organization and security. Subnets can be public (accessible from the internet) or private (not directly accessible from the internet).
  3. Virtual Private Cloud (VPC): The subnet, containing the EC2 instance and its security group, is placed within a Virtual Private Cloud (VPC). A VPC is a logically isolated portion of the AWS cloud where you can launch and manage your resources in a virtual network that you define. It provides control over IP address ranges, subnets, route tables, and network gateways.
  4. Region: Finally, the VPC, along with all its components (subnets, security groups, and EC2 instances), is placed within an AWS Region. A Region is a geographical location where AWS has multiple data centers (Availability Zones). Each Region is independent and isolated from other Regions, providing high availability and fault tolerance.

In summary, an EC2 instance is placed within a security group, which is within a subnet, which is within a VPC, and all of this is within an AWS Region. Understanding this architecture is crucial for properly configuring and securing your EC2 instances in the AWS cloud environment.

Getting Started with Compute EDCOMPv1EN-US assessment question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Getting Started with Compute EDCOMPv1EN-US assessment and earn Getting Started with Compute EDCOMPv1EN-US badge.