390 unique high-quality test questions with explanations

Published en 15 Jun 2024

Description

Are you aiming to become an AWS Certified Cloud Practitioner? Our course, "AWS Certified Cloud Practitioner | 6 Practice Exams," is meticulously crafted to help you succeed. With 390 unique, high-quality test questions, spread across six comprehensive practice exams, this course covers all the essential domains of the AWS Certified Cloud Practitioner exam. Each question comes with detailed explanations, ensuring you understand the key concepts and principles required for the certification. Whether you're a beginner or an experienced professional looking to validate your skills, this course will boost your confidence and knowledge, making you exam-ready. Begin your journey to AWS certification success today!

We recommend re-taking these practice tests until you consistently score 80% or higher - that’s when you’re ready to take the exam and achieve an excellent score! 

Sample Question:

One of your teammates, who is new to AWS, needs your help protecting an EC2 instance. He has deployed a Web application on that EC2 instance. The teammate wants to ensure that only HTTP and HTTPS traffic are allowed to the EC2 instance. Which of the following options would you recommend to your teammate to ensure that only HTTP and HTTPS traffic are allowed to the EC2 instance?

• Network ACLs

• AWS Shield

• Virtual Private Cloud (VPC)

• Security Group

Correct answer

Security Group: Security Groups act as a virtual firewall for your EC2 instances and control inbound and outbound traffic. They are the most suitable option for ensuring that only HTTP and HTTPS traffic are allowed to an EC2 instance as they can be configured to allow specific protocols and ports, such as port 80 for HTTP and port 443 for HTTPS.

Overall explanation

Security Groups are virtual firewalls for your instance to control inbound and outbound traffic. They operate at the instance level and provide stateful filtering of ingress and egress traffic. Here's why Security Groups are the correct choice:

1. Instance-Level Security:

   • Security Groups are directly associated with EC2 instances. They allow you to specify which traffic is allowed to reach your instances.

2. Stateful Nature:

   • Security Groups are stateful, meaning that if you allow an incoming request from a specific IP and port, the response is automatically allowed regardless of outbound rules.

3. Granular Control:

   • You can specify rules based on protocol (e.g., TCP), port number (e.g., 80 for HTTP, 443 for HTTPS), and source/destination IP address or CIDR block.

4. Ease of Use:

   • Security Groups are easy to configure and manage. You can quickly set up rules to allow HTTP (port 80) and HTTPS (port 443) traffic.

How to Configure Security Groups for HTTP and HTTPS:

1. Create a Security Group:

   • Navigate to the Amazon EC2 console.

   • Under "Network & Security," select "Security Groups."

   • Click "Create Security Group."

2. Add Inbound Rules:

   • Add a rule for HTTP traffic:

     • Type: HTTP

     • Protocol: TCP

     • Port Range: 80

     • Source: 0.0.0.0/0 (for all IP addresses) or a specific IP range

   • Add a rule for HTTPS traffic:

     • Type: HTTPS

     • Protocol: TCP

     • Port Range: 443

     • Source: 0.0.0.0/0 (for all IP addresses) or a specific IP range

3. Assign Security Group to EC2 Instance:

   • Attach the newly created Security Group to your EC2 instance.

Why Other Options are Incorrect:

Network ACLs:

• Network ACLs operate at the subnet level, not the instance level, and are stateless, meaning they do not automatically allow response traffic.

AWS Shield:

• AWS Shield is a managed Distributed Denial of Service (DDoS) protection service. It does not control specific traffic types to EC2 instances.

Virtual Private Cloud (VPC):

• A VPC is a virtual network dedicated to your AWS account. While VPCs provide networking infrastructure, they do not control traffic to specific instances. Security Groups within the VPC control traffic.

Resources:

• AWS Security Groups

• AWS Network ACLs

• AWS Shield

• Amazon VPC