What is the role of a personal firewall?

The role of a personal firewall is fundamentally to protect against unauthorized intrusions. This type of software or hardware acts as a barrier between a user's computer and external networks, such as the internet. It monitors incoming and outgoing traffic, deciding whether to allow or block specific data packets based on predetermined security rules. By doing this, it helps prevent unauthorized access to the system, which might include attacks from hackers, malware, or any other malicious activity.

While optimizing network speed, facilitating data backup, and enhancing system performance are important aspects of computer and network management, they do not fall under the primary function of a personal firewall. The protective measure it provides is essential for maintaining the integrity and confidentiality of personal data and safeguarding devices connected to a network, making its role crucial in personal cybersecurity practices.