Explanation
<p>A firewall is a program or hardware device that filters incoming and outgoing network traffic based on predetermined security rules. It protects a network or computer system from unauthorized access or threats coming through an internet connection.</p><p><span style="font-size: 1rem; letter-spacing: 0.01rem;">So,</span></p><p>Firewall is used to filter information coming through an internet connection to a network or computer system.</p>
