CompTIA ITF+ Practice Test 2026 – All-in-One Resource for Complete Exam Success!

The primary purpose of a firewall in network security is to monitor and control incoming and outgoing network traffic. Firewalls act as a barrier between a trusted internal network and untrusted external networks, such as the internet. By establishing a set of rules and policies, a firewall can determine which types of traffic are allowed to enter or leave the network. This capability helps to protect the network from unauthorized access, malware, and other threats.

While other functions like managing user access can be part of a broader security strategy, and encryption is crucial for protecting data in transit, these roles are not the fundamental purpose of a firewall. Firewalls specifically focus on regulating traffic based on specified security rules, thus playing a crucial role in defending the network's integrity and security.