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Which of the following options correctly defines a firewall (in the context of computing)?
1. It is a hardware device.
2. It is a combination of software and hardware-based devices to permit any and every network transmission.
3. It is a combination of both, software and hardware devices to permit or deny network transmission based on a set of rules.
4. It is the name of a software.

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Correct Answer - Option 3 : It is a combination of both, software and hardware devices to permit or deny network transmission based on a set of rules.

The correct answer is It is a combination of both, software and hardware devices to permit or deny network transmission based on a set of rules.

A firewall is a combination of both, software and hardware devices to permit or deny network transmission based on a set of rules.

  • Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization's previously established security policies.
  • It is a system designed to prevent unauthorized access to or from a private network.
  • We can implement a firewall in either hardware or software form, or a combination of both.
  • It prevents unauthorized internet users from accessing private networks connected to the internet, especially intranets.
  • All messages entering or leaving the intranet (the local network to which you are connected) must pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.
  • It is essentially the barrier that sits between a private internal network and the public Internet.
  • There are three basic types of firewalls:-
    • Packet Filters,
    • Stateful Inspection 
    • Proxy Server Firewalls

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