Chapter 6.5 - Security Groups & Bootstrap Scripts

Question 1

What is the Linux Communication Protocol & Network Port?

Answer 1

SSH = Secure Shell

Port 22

Question 2

What is the Windows Communication Protocol & Network Port?

Answer 2

RDP = Remote Desktop Protocol

Port 3389

Question 3

What is the Unencrypted Web Browsing Protocol & Network Port?

Answer 3

HTTP = Hypertext Transfer Protocol

Port 80

Question 4

What is the Encrypted Web Browsing Protocol & Network Port?

Answer 4

HTTPS = Secure Hypertext Transfer Protocol

Port 443

Question 5

What is a Security Group in AWS?

Answer 5

Security groups are virtual firewalls for your EC2 instance.

Question 6

What are the fundamental characteristics of Security Groups?

Answer 6

In real world scenarios you would only open SSH and HTTPS in order to maintain security.

Changes to security groups take effect immediately.

You can have any number of EC2 instances within a security group.

You can have multiple security groups attached to EC2 instances.

All inbound traffic is blocked by default

All outbound traffic is allowed.

Question 7

What is the fundamental purpose for Bootstrap Scripts?

Answer 7

A bootstrap script is a script that runs when the instance first runs. It passes user data to the EC2 instance and can be used to install applications (like web servers and databases), as well as do updates and more.