Can you explain the concept of a firewall and how it helps in protecting a network from cyber threats?

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The Concept of a Firewall in Network Security

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and an untrusted external network, such as the internet, to prevent unauthorized access while allowing legitimate traffic to pass through.

How Firewall Protects a Network from Cyber Threats

Firewalls help protect a network from cyber threats by inspecting network packets and determining whether to allow or block them based on the configured rules. They can filter traffic based on IP addresses, protocols, ports, and applications, effectively blocking malicious traffic and unauthorized access attempts.

Additionally, firewalls can detect and block suspicious activities, such as port scanning, denial-of-service attacks, and malware-infected files, enhancing the overall security of the network. By acting as a gatekeeper, a firewall helps safeguard sensitive data, prevent unauthorized access to critical systems, and mitigate the risks posed by cyber threats.

Overall, the implementation of a robust firewall is crucial for bolstering network security and defending against a wide range of cyber threats in today's interconnected digital landscape.

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