Firewalls use Access Control Lists (ACLs)

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.
Respond to the following in a minimum of 175 words:
Research 5 types of firewalls.
Discuss the basic limitations of a typical firewall's security. What does a firewall not do for protection?