Description: A VPC security group acts as a virtual firewall for your Virtual Private Cloud (VPC) instances to control inbound and outbound traffic. This security mechanism allows you to define rules that specify what traffic is allowed or denied, both for incoming and outgoing connections. Security groups are essential for protecting cloud instances, as they enable users to set 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, security groups are dynamic, meaning that changes to the rules are applied immediately to all associated instances without the need for a restart. This feature is particularly useful in cloud environments where scalability and adaptability are essential. In summary, VPC security groups are a key tool for managing the security of cloud applications, allowing administrators to effectively and efficiently control access to their resources.
