Those original 4 billion unique addresses were not all able to be assigned to devices for communication. The main use of NAT is to limit the number of public IP addresses an organization or company must use, for both economic and security purposes. That means only one public address is needed for hundreds or even thousands of users. When NAT is used in this way, all users inside the private network access the Internet have the same public IP address when they use the Internet. From the perspective of the workstation, it appears that communication is directly with the site on the Internet. From the perspective of the resource on the Internet, it is sending information to the address of the firewall. It then makes the same request to the Internet using its own public address and returns the response from the Internet resource to the computer inside the private network. The firewall sees the request from the computer with the internal IP. Routers within the network recognize that the request is not for a resource inside the network, so they send the request to the firewall.
Internet requests that require Network Address Translation (NAT) are quite complex but happen so rapidly that the end user rarely knows it has occurred.Ī workstation inside a network makes a request to a computer on the Internet. However, to access resources outside the network, like the Internet, these computers have to have a public address in order for responses to their requests to return to them. Routers inside the private network can route traffic between private addresses with no trouble. The private addressing scheme works well for computers that only have to access resources inside the network, like workstations needing access to file servers and printers.
NEOROUTER ROUTABLE IP ADDRESSES HOW TO
It follows that with the massive population explosion, coupled with the fact that some of the 7.97 billion people on this planet have several devices in their homes and in their back pockets, we needed to figure out how to get more devices on the internet. Basically, it works like your street address–as a way to find out exactly where you are and deliver information to you. An IP address is a unique 32-bit number that identifies the location of your computer on a network. So what does the size of the Internet have to do with NAT? Everything!įor a computer to communicate with other computers and web servers on the Internet, it has to have an IP address. That is more than the entire population of the United States! In fact, the rate of growth has been such that the Internet is effectively doubling in size each year. So having 4 billion IP version 4 addresses available seemed like more than enough.Īt this point, the current estimate is that there are about 100 million hosts and more than 350 million users actively on the Internet. At the time of its inception, the Internet was an avenue for academics–it was not meant for you and me. When the IP version 4 address was created, engineers had no concept of how big the internet would become. IP version 4 is the fourth version of the Internet Protocol. If you are viewing this article on the internet on the WIMIA website, there’s a very good chance that you are using Network Address Translation (NAT) right now. Its purpose is to translate a set of IP addresses to another set of IP addresses. Network Address Translation (NAT) is a service that is used in routers. The definition of Network Address Translation
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