It acts as a barrier between trusted internal networks and untrusted external networks. _ A firewall is a network security device or software that monitors and controls incoming and outgoing network traffic based on predefined security rules
• Used in corporate networks to protect against external threats by filtering incoming and outgoing traffic.• Applied in home networks to prevent unauthorized access to personal devices and data.
A firewall filters network traffic, allowing only authorized traffic to pass through while blocking potentially harmful or unauthorized traffic.
The main types are hardware firewalls, software firewalls, and cloud-based firewalls, each providing different levels of network protection.
While firewalls are essential for security, they cannot protect against all threats, such as insider attacks or social engineering, and must be combined with other security measures.
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