PAT is a kind of #202206281824 that uses one public address for many private addresses (call overloading). Such sharing is possible because instead of assigning a public address to a private address, it utilises high port numbers (49152-65535) to establish a network connection session. This has an advantage of having more address space than other DNAT implementations.
Port Address Translation (PAT)
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IPv6 Address
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IPv4 Address
Although there are technologies such as Network Address Translation (NAT)# and Port Address Translation (PAT)# trying to overcome the limitation of IPv4 Address, the possibility of running out of public address becomes greater as Regional Internet Registry (RIR)# starts facing the trouble of exhausted IPv4 Addresses in the 2010s due to the introduction of personal digital assistant (PDA), cellphones, Internet of Things (IoT) etc. The alternative is to switch over to IPv6 Address#.
- Dynamic NAT