AWS, JavaScript, React - Deploy Web Apps on the Cloud - Introduction to Security Groups

The video tutorial explains AWS security groups, which act as virtual firewalls for instances, controlling inbound and outbound traffic. Instances can be assigned up to five security groups, with default assignments if unspecified. Security groups consist of rules that filter traffic based on protocols and port numbers. These rules are divided into inbound and outbound categories, with AWS allowing only allow rules. By default, security groups have no inbound rules, denying all inbound traffic, while allowing all outbound traffic unless specified otherwise. The tutorial concludes with a preview of a practical guide to reinforce the concepts discussed.

What is the primary function of a security group in AWS?

• To monitor the performance of instances

• To manage user access to AWS services

• To act as a virtual firewall for instances

• To provide storage for instances

How many security groups can an instance be assigned to when launched within a VPC?

• Ten

• Five

• Three

• One

What do security group rules primarily filter traffic based on?

• Instance type and size

• Data storage capacity

• Protocols and port numbers

• User roles and permissions

What is the default behavior of a security group regarding inbound traffic?

• Only HTTP traffic is allowed

• Only SSH traffic is allowed

• All inbound traffic is allowed

• All inbound traffic is denied

What happens to outbound traffic if no outbound rules are configured in a security group?

• All outbound traffic is allowed

• All outbound traffic is denied

• Only HTTPS traffic is allowed

• Only outbound traffic to the same VPC is allowed