Which solution allows external users to access only an internal FTP server on a private network?
- dynamic NAT
- NAT with overload
- port forwarding
- static NAT
Explanation: Port forwarding can be used to permit other users to reach devices on an internal network through the Internet. The firewall in the router determines if the traffic should be forwarded to an internal device based on the port number. Port numbers are associated with specific services, such as FTP, HTTP, HTTPS, and POP3.
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