Define firewall purpose.

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Firewalls are like the security guards of a network—they monitor and control incoming and outgoing traffic based on predefined security rules. Their main job is to protect your network from unauthorized access, cyberattacks, and data breaches.

The purpose of a firewall is to protect a computer network by controlling incoming and outgoing network traffic based on predetermined security rules.

Key Functions of a Firewall:

  1. Traffic Filtering: Blocks unauthorized access while allowing legitimate communication.

  2. Threat Prevention: Helps prevent malware, hackers, and other cyber threats from entering the network.

  3. Access Control: Enforces security policies by permitting or denying traffic based on IP addresses, ports, or protocols.

  4. Monitoring and Logging: Tracks network activity for auditing and detecting suspicious behavior.

Types of Firewalls:

  • Network-based firewalls: Protect entire networks.

  • Host-based firewalls: Protect individual devices or servers.

  • Hardware or software firewalls: Can be physical appliances or software applications.

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