Final answer:
A firewall is designed to protect sensitive files by managing and scrutinizing data traffic, allowing or blocking packets based on security rules.
Step-by-step explanation:
A firewall is a dedicated computer that interfaces with computers outside a network and has special security precautions built into it in order to protect sensitive files on computers within the network.
The primary purpose of a firewall is to control the incoming and outgoing network traffic by analyzing the data packets and determining whether they should be allowed through based on a predetermined rule set. A network's security is often bolstered by firewalls, which can come in the form of hardware, software, or a combination of both.
A firewall is a dedicated computer that interfaces with computers outside a network and has special security precautions built into it in order to protect sensitive files on computers within the network.