Network address translation - Wikipedia
        
    https://en.wikipedia.org/wiki/Network_address_translation
        Network address translation (NAT) is a method of remapping an IP address space into another by modifying network address information in the IP header of packets while they are in transit across...
    
        Network Address Translation (NAT) FAQ - Cisco
        
https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/26704-nat-faq-00.html
        A. Network Address Translation (NAT) is designed for IP address conservation. It enables private IP networks that use unregistered IP addresses to connect to the Internet. NAT operates on a router...