Final answer:
Personal firewalls are responsible for monitoring all network traffic to and from a computer, managing data packets, and protecting against unauthorized access and cyber threats.
Step-by-step explanation:
Personal Firewalls constantly monitor all network traffic to and from a computer. This includes all incoming and outgoing data packets to ensure that no unauthorized access is taking place and to protect the computer from a variety of threats, including hacking attempts, malware, and other forms of cyberattacks. Personal firewalls can be configured to block or allow specific traffic, and they may also provide alerts to the user about any suspicious activity.