What is a fire wall and how does it work

a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules

Firewalls are software or hardware that work as a filtration system for the data attempting to enter your computer or network. Firewalls scan packets for malicious code or attack vectors that have already been identified as established threats

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Have a great day

answer: a i guess

explanation:

answer(d) sequencing and iteration;