Based on the IP header data, such as the source or destination IP address, protocol, or socket number, an access control list filters traffic.
By blocking particular routing updates or controlling traffic flow, an ACL can be used to increase security. You can filter packets for a single or collection of IP addresses, as well as for other protocols like TCP or UDP, using an ACL.
The firewall runs a quick inspection on the data packets passing through the router, looking at things like the IP addresses of origin and destination, the kind of packet, the port number, and other surface-level information without actually opening the packet to look inside. Firewalls with packet filtering operate at Layer 3. These firewalls are regarded as being of the first generation.
Learn more about address here-
https://brainly.com/question/20012945
#SPJ4
