What is Network ACLs?

Network Access Control Lists (ACLs) are a fundamental security feature used to control network traffic by permitting or denying packets based on defined rules. They operate at Layer 3 (Network Layer) and Layer 4 (Transport Layer) of the OSI model, examining source/destination IP addresses, ports, and protocols. ACLs are commonly deployed on routers, switches, and firewalls to filter traffic, enhance security, and enforce network segmentation policies. They are essential for creating secure and well-managed networks.