What is the primary function of a firewall in a network?

The primary function of a firewall in a network is to block unauthorized access. Firewalls serve as a barrier between a trusted internal network and untrusted external networks, such as the Internet. They monitor and control incoming and outgoing network traffic based on predetermined security rules. By filtering traffic and blocking potentially harmful requests, firewalls help protect sensitive data and systems from intrusions, attacks, and other security threats.

The role of a firewall is essential in maintaining the security of a network. It acts as the first line of defense, allowing only legitimate traffic through while preventing malicious activities. This proactive approach to network security ensures that unauthorized users cannot access restricted data or systems, thereby safeguarding the overall integrity of the network.