The main difference between NAT and PAT is that NAT is a process/technology where a router or a similar network device translates one IP address into another IP address, whereas with PAT each host on a LAN is translated to the router’s WAN-side public IP address, with a … Sometimes PAT is also called Overloaded NAT. As you can see, the first letter in each acronym denotes the difference between NAT (Network Address Translation) and PAT (Port Address Translation), which should make it easier for you to remember which does what. Sometimes PAT is also called Overloaded NAT. On the other hand, PAT is a type of NAT where the multiple private IP addresses are mapped into a single public IP (many-to-one) by using ports. NAT Overload or PAT: It is common to hide an entire IP address space, usually consisting of private IP addresses, behind a single IP address (or in some cases a small group of IP addresses) in another … PAT, which is also known as NAT overloading, uses 16-bit source port numbers to map and track traffic between an internal host and the Internet. Home users who talk about NAT are actually talking about PAT, or Port Address Translation. This is quite easy to remember: PAT translates ports, as the name implies, and likewise, NAT translates addresses. The main difference between NAT and PAT is that NAT is used to map public IP addresses to private IP addresses, it could be a one-to-one or many-to-one relation. Home users who talk about NAT are actually talking about PAT, or Port Address Translation. NAT device acts as gateway for all the computers. With static PAT, translations exist in the NAT translation table as soon as you configure static PAT command(s), and they remain in the translation table until you delete the static PAT command(s). NAT stands for Network Address Translation and PAT stands for Port Address Translation. This is quite easy to remember: PAT translates ports, as the name implies, and likewise, NAT translates addresses. The difference between NAT and PAT is that NAT is network address translation that is used to map public IP addresses to private IP addresses, NAT can be one to one and many to one whereas PAT is Port address translation that is the type of NAT in which multiple private IP addresses are mapped into single public IP by using ports. A network address translation device obscures all details of the computers connected to the local network.