You have been learning how firewalls use Access Control Lists (ACLs) to block traffic

You have been learning how firewalls use Access Control Lists (ACLs) to block traffic from specified IP addresses. Firewalls can also block ports; however, firewalls do not provide complete security.
Research 5 types of firewalls.
Discuss the basic limitations of a typical firewall’s security. What does a firewall not do for protection?