AWS Security Practice Test 2025 – Complete Exam Prep

The purpose of VPC security groups is to control inbound and outbound traffic for resources within a Virtual Private Cloud (VPC). Security groups act as virtual firewalls that help define what traffic is allowed in or out of instances in a VPC, based on specified rules. These rules can be configured to allow or deny specific types of traffic, which makes them essential for maintaining the security and integrity of the applications running within the VPC.

By setting rules based on IP protocol, port number, and source/destination IP address or CIDR blocks, users can finely tune the network traffic, ensuring that only legitimate requests reach their applications and that sensitive data flows securely. This functionality is critical in managing network security and ensuring compliance with organizational policies and regulatory requirements within AWS environments.

The other options refer to different aspects of cloud resource management: allocating storage space is more related to services like Amazon S3 or EBS, managing service quotas pertains to resource limits imposed by AWS, and ensuring geographical redundancy is about deploying resources across multiple AWS regions for availability and resilience, none of which encapsulate the primary function of security groups.