what are router firewalls?

routers firewalls

There are two types of firewalls: hardware firewall and software firewall. The router functions as a hardware firewall, while Windows includes a software firewall. Other third-party firewalls can be installed.

In August 2003, if you connected a Windows XP system to the Internet without a firewall, the Blaster worm could be caught in minutes, taking advantage of the vulnerable network services revealed by Windows XP on the Internet.

In addition to demonstrating the importance of installing security patches, this highlights the importance of using a firewall, which avoids incoming network traffic.