: Stateless layers of security that control traffic entering or leaving an entire subnet.
: Stateful virtual firewalls that control traffic at the individual instance (server) level. virtual private cloud
A is a secure, logically isolated private network established within a public cloud infrastructure . It allows organizations to harness the scalability and cost-efficiency of the public cloud while maintaining the granular control and security typical of a private, on-premises data center. Conceptual Foundation: Private Space in a Public World : Stateless layers of security that control traffic