Maximum TTL Values

Hello,

Let?s say we?re administrating our own DNS servers...

1- If we have very high TTL values, ...apart from the disadvantages,...it would lower the traffic generated, correct?

2- In the case above, what's the maximum TTL values we can set for a certain domain?


I read somewhere that we could push it to 3 days? In other place I saw 3 to 7 days depending on the type of files they are using...(3 days for text-type objects, 7 days for binary).

Anybody knowledgeable on that....so as to give us some light?
Thank you
 
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