The primary function of firewall in network security is

  1. To monitor network traffic and detect anomalies.
  2. To create virtual private networks for secure communication.
  3. To filter incoming and outgoing network traffic based on security rules
  4. To encrypt data before Transmission.

Answer (Detailed Solution Below)

Option 3 : To filter incoming and outgoing network traffic based on security rules

Detailed Solution

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The correct answer is To filter incoming and outgoing network traffic based on security rules.

Key Points

  • The primary function of a firewall in network security is to filter incoming and outgoing network traffic based on security rules.
    • Firewalls establish a barrier between a trusted internal network and untrusted external networks, such as the Internet.
    • They inspect incoming and outgoing traffic and allow or block traffic based on predefined security rules.
    • Firewalls can help prevent unauthorized access, monitor network traffic, and protect against various types of cyber attacks.
    • They can be hardware-based, software-based, or a combination of both.
    • Firewalls are essential components in maintaining network security and ensuring data integrity.

Additional Information

  • Firewalls can also provide additional features such as VPN support, intrusion detection and prevention, and content filtering.
  • They help protect against common threats such as malware, phishing, and denial-of-service attacks.
  • Modern firewalls may include advanced features like application-level filtering and user authentication.
  • The concept of a firewall has evolved over time to adapt to new types of network threats and security requirements.
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