Firewalls and Their Role in Internet Security
A firewall is a network security system designed to monitor and control incoming and outgoing network traffic based on predetermined security rules. Firewalls are an essential defense mechanism for both personal devices and corporate networks. They can be implemented as hardware or software solutions and are configured to filter traffic, prevent unauthorized access, and detect malicious activity. Modern firewalls often come with advanced features like Deep Packet Inspection (DPI), intrusion prevention systems (IPS), and application-layer filtering to provide robust protection against a wide range of threats. Proper firewall configuration and maintenance are crucial for ensuring that sensitive data remains secure.