true and false. firewall is just like a gatekeeper that motors incoming network traffic.
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the correct answer is true...
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The firewall traces back to an early period in the modern internet era when systems administrators discovered their network perimeters were being breached by external attackers. There was destined to be some sort of process that looked at network traffic for clear signs of incidents.
Steven Bellovin, then a fellow at AT&T Labs Research and currently a professor in the computer science department at Columbia University, is generally credited -- although not by himself -- with first using the term firewall to describe the process of filtering out unwanted network traffic. The name was a metaphor, likening the device to partitions that keep a fire from migrating from one part of a physical structure to another. In the networking case, the idea was to insert a filter of sorts between the ostensibly safe internal network and any traffic entering or leaving from that network's connection to the broader internet.
true dude