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Firewalls serve as the first line of defense in network security, safeguarding electronic devices such as computers and computer accessories from unauthorized access and potential threats. They act as a barrier between trusted internal networks and untrusted external networks, scrutinizing incoming and outgoing traffic to prevent malicious activities. Firewalls are essential for maintaining the integrity and confidentiality of data transmitted over networks, shielding devices like scanners, network scanners, and other connected equipment from cyber attacks. By implementing robust firewall protection, users can ensure secure connections, safeguard their digital assets, and maintain a reliable computing environment.