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

Explanation:

Have a great day

answer(1) opinion of the reporting officer;

answer; (2)all forms of survelliance;

answer; (b) a thief breaks into a vending machine;

to change your username, you must:

1) make sure what the username you want to change to is allowed in this community

2) contact a administrator (for example, jaysl)

3) through pm, tell the admin what you want to change to

4) if the username is allowed, it will be changed in a matter of seconds (minutes at most)

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