Crescent Technocrats Club

WHAT IS A FIREWALL? A firewall is a network security tool that keeps track of and filters incoming and outgoing network traffic by previously specified security policies for an organization. A Real-World Example is Windows defender. USE OF FIREWALL Any security design must have a firewall because it gives your network security device control over host-level defenses, eliminating the need for guesswork. Firewalls focus on blocking malware and application layer attacks. LAYERS OF FIREWALL We'll discuss the Firewall layers starting with the application layer that directly benefits the end user and working our way down to the physical layer. 7. APPLICATION LAYER Human-Computer Interaction Layer, where applications can access network services. 6.  PRESENTATION LAYER Ensures that the data is in a usable format and data encryption occurs here. 5.  SESSION LAYER Maintains connections and is responsible for controlling ports and sessions. 4. TRANSPORT LAYER Transmits Data using transmi...