Why are firewalls critical in network security?

Firewalls are critical in network security primarily because they act as a barrier between trusted internal networks and untrusted external networks, such as the internet. Their main function is to prevent unauthorized access to or from a network. By analyzing incoming and outgoing traffic based on predetermined security rules, firewalls help to block potential threats, such as cyber-attacks and unauthorized access attempts, thereby protecting sensitive data and maintaining the integrity of the network.

While firewalls can indirectly contribute to other aspects of network performance, such as maintaining a stable and secure environment, their primary role is centered around security by safeguarding the network from malicious entities. This capability is essential for organizations looking to protect their infrastructure and digital assets from ever-evolving threats in the cyber landscape.