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:

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it is much more convenient for the consumer to order something online, rather than going to a store. it saves them time and money for them, especially if that item is not accessed easily.