What does a firewall primarily protect against?

A firewall primarily protects against unauthorized network access by monitoring and controlling incoming and outgoing network traffic based on predetermined security rules. This technology acts as a barrier between a trusted internal network and untrusted external sources, such as the internet. By filtering traffic and enforcing access controls, a firewall helps to prevent unauthorized users from accessing sensitive data or resources within a network.

While firewalls can play a role in overall cybersecurity by helping to deter malware and other threats, their primary function is specifically related to controlling access. Other security measures and programs are typically employed to combat issues such as data loss, malware installation, and spyware tracking. These tasks often require additional layers of protection and are handled by different types of security software and strategies.