Which type of firewall is commonly part of a router firewall and allows or blocks traffic based on Layer 3 or 4 information?

Which type of firewall is commonly part of a router firewall and allows or blocks traffic based on Layer 3 or 4 information?

• next generation firewall
• stateful firewall
• packet filtering firewall
• proxy firewall

Explanation: A packet filtering firewall uses a simple policy table look-up that filters traffic based on specific criteria. These firewalls are usually part of a router firewall. They permit or deny traffic based on Layer 3 and Layer 4 information.

Exam with this question: Module 9: Quiz – Firewall Technologies Network Security
Exam with this question: Network Defense: Module 5.3.2 Firewall Technologies Quiz