I am curious about the role of NAT (Network Address Translation) in online gaming. I noticed that some games, such as Destiny 2 and Warzone, display the NAT type (Strict, Moderate, Open) of the players and use it to filter the matchmaking. However, other games, such as Apex Legends, PUBG, Paladins, etc., do not seem to have this feature or show the NAT type of the players.

 
Therefore, I have three questions:

 

What is the meaning and function of NAT type in online gaming?


What are the advantages and disadvantages of having NAT type filtering in online games?


What are the reasons and challenges for implementing NAT type filtering in online games?

 
Thank you for your time and expertise.

 
P.S.
 English is not my native language, so please excuse any errors or ambiguities.
 
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