Which of the following is a technology used to prevent unauthorized access to network resources, by examining incoming and outgoing network traffic and deciding to allow or block specific traffic based on a defined set of security rules?
A firewall is designed to prevent unauthorized access to or from a private network. It can be implemented in either hardware or software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.
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What are the different types of firewalls?
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What is the difference between a firewall and an intrusion detection system (IDS)?
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How does a firewall evaluate incoming and outgoing traffic?