Fourth$-$generation firewalls are also known as stateful firewalls. The most important upgrade from first$-$generation Firewalls is the ability to keep track of the TCP connection state. Greatly prevents hackers' access. Firewalls are able to determine if packets are part of a new connection or existing connection. The fourth generation of firewalls, also called dynamic packet filters, guards against incoming traffic by developing ACLs for new sessions. Firewalls using this scheme work on the network layer to enable connections through particular ports.

Question : Explain What FW$4$ is and list out the benefits of this version of the firewall?