title: What is the difference between NAT and PAT?
body: <p>PAT is also called overloading NAT. I don't understand why we need to use PAT? NAT alone is handling IPv4 addresses then why it is required to translate port also?Today's home wifi router use both NAT and PAT simultaneously which is also called NPAT. Your network will still work without PAT also then why PAT is used?</p>
  
  <p>NAT: Network Address Translation; PAT: Port Address Translation</p>