The conversation between human and AI assistant.
[|Human|] Which rocks are used to make a firewall?
[|AI|] Firewalls are not made of physical rocks. The term "firewall" refers to a network security system that monitors and controls incoming and outgoing network traffic. It is a software or hardware-based solution that creates a barrier between an internal network and the internet, preventing unauthorized access and protecting against threats.
[|Human|] 
Which rocks are used to make a firewall?