Jacqueline

A firewall is a device or system that protects computer systems and networks from unauthorized access by preventing packets that originate from one system or network and intended for another from entering the system or network.

A firewall is typically a network-based security appliance or application that sits between the user’s computer systems and the Internet. It can be installed on the user’s computer system or on a separate server.

A firewall is used to protect computer systems from unauthorized access by preventing packets that originate from one system or network and intended for another from entering the system or network. The most common use for a firewall is to protect computer systems from unauthorized access by preventing packets that originate from the Internet and intended for a local computer system from entering the system.