A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules. Its primary function is to act as a barrier between a trusted internal network and untrusted external networks, such as the internet, by examining and filtering packets.
Firewall application is used for :-
Asked in Assistant Engineer (AE) Exam 2013 · Topic: Cyber Security and Cyber Crimes (Cyber Security Technologies and Countermeasures: Firewalls, Intrusion Detection/Prevention Systems (IDS/IPS), Encryption, VPNs, Antivirus, Multi-factor Authentication)
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Answer: A. Trapping inbound or outbound packets
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