Question -
A _____ is a computer, appliance, or router that sits between the trusted and untrusted systems.
Options:
A .  firewall
B .  bridge
C .  switch
D .  hub
Answer: Option A Answer: (a) A firewall is a computer appliance or router that sits between the trusted and untrusted systems. It enables a computer to be connected safely to an untrustworthy network. It is a network security system that monitors and controls the incoming and outgoing network traffic based on predetermined security rules.
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