Description: A VPC security group acts as a virtual firewall to control the inbound and outbound traffic of your Virtual Private Cloud (VPC). This mechanism allows users to define specific rules that determine what traffic is allowed or denied, both from external sources to the instances within the VPC and from these instances to the external network. Security groups are fundamental for the security of cloud applications, as they enable users to establish access policies based on IP addresses, protocols, and ports. Each security group can be associated with multiple instances, and an instance can be associated with several security groups, providing flexibility in security configuration. Additionally, changes to security group rules take effect immediately, allowing for dynamic and efficient management of network security. In summary, VPC security groups are essential tools for protecting cloud resources, ensuring that only authorized traffic can access instances and services within the VPC.
