Leslie, the network administrator of Livewire Technologies, has been recommending multilayer inspection firewalls to deploy the company’s infrastructure. What layers of the TCP/IP model can it protect?
Multilayer inspection firewalls, also known as Next-Generation Firewalls (NGFWs), are designed to provide comprehensive security by inspecting traffic across multiple layers of the TCP/IP model. These firewalls offer protection at the:
Application Layer: They can analyze and filter traffic based on application-level protocols and payloads, such as HTTP, FTP, and DNS, providing protection against application-specific attacks.
Transport Layer (TCP): They inspect the transport layer to monitor and control TCP/UDP traffic, preventing threats such as port scans and DoS attacks.
Internet Layer (IP): They filter and monitor IP packets, enforcing security policies based on IP addresses and ensuring protection against IP-level attacks like IP spoofing.
By operating at these layers, multilayer inspection firewalls provide a robust defense mechanism against a wide range of network threats.
References:
EC-Council Certified Network Defender (CND) Study Guide
Documentation on Next-Generation Firewalls and their functionalities
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