How does a firewall handle traffic when it is originating from the public network and traveling to the DMZ network?

How does a firewall handle traffic when it is originating from the public network and traveling to the DMZ network?

• Traffic that is originating from the public network is inspected and selectively permitted when traveling to the DMZ network.
• Traffic that is originating from the public network is usually permitted with little or no restriction when traveling to the DMZ network.
• Traffic that is originating from the public network is usually forwarded without inspection when traveling to the DMZ network.
• Traffic that is originating from the public network is usually blocked when traveling to the DMZ network.