What is the primary purpose of a firewall in network security, and how does it defend against unauthorized access?
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What is the primary purpose of a firewall in network security, and how does it defend against unauthorized access?
A firewall acts as a barrier between a trusted network and an untrusted network, typically the internet. Its primary purpose is to control incoming and outgoing network traffic based on an applied rule set. By enforcing these rules, a firewall defends against unauthorized access by blocking potentially harmful or malicious data packets from reaching the internal network while allowing legitimate traffic to pass through. This helps prevent unauthorized users from gaining access to sensitive information or compromising the network’s security.