ITHELPDESK

NAT – Network Address Translation NAT definition: NAT is a method used to translate private IP addresses into a public IP address when the devices in the local network need to communicate through the internet. NAT allows a host that does not have a valid, registered, globally unique IP address to communicate with other hosts through the internet. Why NAT (Network Address Translation) is used? To extend the life of IPV4 as the network layer protocol of the internet by saving the IPV4 public address space. NAT saved the remaining unused IPV4 public address space by allowing the private addresses to communicate through the internet using one or few public address space. Instead of assigning 500 public IPs to the devices used in a company, one or two public address is sufficient for them to communicate through the Internet. Hosts in a LAN will use private IP addresses (free to use) to communicate with them. They use the purchased public address only when it is required to com...