Firewall is used to encrypt transmission of data
Answers
Answer:
In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.[1] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet.[2]
Explanation:
The term firewall originally referred to a wall intended to confine a fire within a line of adjacent buildings.[3] Later uses refer to similar structures, such as the metal sheet separating the engine compartment of a vehicle or aircraft from the passenger compartment. The term was applied in the late 1980s to network technology[4] that emerged when the Internet was fairly new in terms of its global use and connectivity.[5] The predecessors to firewalls for network security were routers used in the late 1980s. Because they already segregated networks, routers could apply filtering to packets crossing them.[6]
Before it was used in real-life computing, the term appeared in the 1983 computer-hacking movie WarGames, and possibly inspired its later use.[7]