NAT vs. PAT

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.

Advertisement - Continue Reading Below
NAT vs. PAT

Two network protocols are very important one is NAT that is network address translation, and other is PAT that is port address translation.  These are network protocols, the primary purpose of these network protocols are to map the unregistered private address that is also known as inside local address to a registered public address that is also known as inside global. This is done before transferring the packet in an external network. NAT that 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. In network address, translation host address belongs to an internal network. This address is not assigned by a network information center that is also known as a service provider. In the global address, the address is a licit address that is assigned by the network information center.  There was a great rate of depletion of available IP address space, so the purpose of creation of NAT was to slow the rate of depletion that was done by enabling many private IP addresses.

Advertisement - Continue Reading Below

If we talk about the main difference then the main 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. If any user of an internal network that has private IP that is also known as unregistered address cant connect to the internet because each device needs a unique IP address. Network address translation connect two networks together and then translates internal network private address into the legal public address. PAT that 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. The job of PAT is to map multiple sources local addresses and port to single global address. The interface of IP address in PAT is used in combination with the port number. Every network has IP address as the port number is unique.  NAT can translate 16 bit number into port numbers. NAT provides security as the translation process is transparent. NAT is a tool for network migration and merging it is also server load sharing and virtual server creation.  There are two types of NAT that are static NAT that is mapped to a global address, and there is just one to one relationship in static NAT. The second type is dynamic NAT that converts unregistered private IP address to registered private IP address. The last type is PAT.

Comparison Chart

BasisNATPAT
Meaning 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

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.

Advertisement - Continue Reading Below

 

Use NAT use IPv4 addressPAT uses IPv4 addresses along with the port number.
Type Types of NAT are static NAT and dynamic NATTypes of PAT are static PAT and overloaded PAT
RelationshipNAT is a superset of PATPAT is type of NAT

 What is NAT?

NAT that 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. In network address, translation host address belongs to an internal network. This address is not assigned by a network information center that is also known as a service provider. In the global address, the address is a licit address that is assigned by the network information center.  There was a great rate of depletion of available IP address space, so the purpose of creation of NAT was to slow the rate of consumption that was done by enabling many private IP addresses. NAT provides security as the translation process is transparent. NAT is a tool for network migration and merging it is also server load sharing and virtual server creation.  There are two types of NAT that are static NAT that is mapped to global address, and there is just one to one relationship in static NAT. The second type is dynamic NAT that converts unregistered private IP address to registered private IP address. The last type is PAT.

What is PAT?

PAT that 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. The job of PAT is to map multiple sources local addresses and port to single global address. The interface of IP address in PAT is used in combination with port number. Every network has IP address as the port number is unique.  NAT can translate 16 bit number into port numbers.

Key Differences

  1. 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.
  2. NAT use IPv4 address whereas PAT uses IPv4 addresses along with the port number.
  3. Types of NAT are static NAT and dynamic NAT whereas types of PAT are static PAT and overloaded PAT.
  4. NAT is a superset of PAT whereas PAT is type of NAT.
Advertisement - Continue Reading Below

Conclusion

In this article, we see the clear difference between NAT and PAT that are network protocols.

Explanatory Video

Leave a Comment