- Firewall: A network security device that monitors and filters incoming and outgoing traffic.
- Packet Filtering: Inspecting packets based on source/destination IP, port, or protocol.
- Stateful Inspection: Firewall keeps track of the state of active connections and makes decisions based on context.
- NGFW (Next-Generation Firewall): Modern firewall with integrated features like intrusion prevention, application awareness.
- ACL (Access Control List): Rules defining permitted or denied network traffic.
- NAT (Network Address Translation): Technique to map private addresses to public ones.
- VPN (Virtual Private Network): Secure connection between networks over the Internet.