“A firewall in a computer is mainly used for:”

"A firewall enhances computer security by blocking unauthorized access to systems or networks. It acts as a barrier monitoring and filtering incoming and outgoing traffic based on predefined rules. Firewalls protect against cyber threats like hacking and malware ensuring data integrity and privacy. Used in both personal and enterprise settings they are critical for safeguarding sensitive information. Their role in cybersecurity highlights the importance of network protection in today’s digital landscape where secure data transmission is essential for safe online operations."