BIND DNS rate-limit: qps-scale understanding

Hey bind-users, I have a few questions concerning qps-scale. Referencing: http://www.zytrax.com/books/dns/ch7/hkpng.html#rate-limit

BIND DNS rate-limit: qps-scale understanding

Referencing: http://www.zytrax.com/books/dns/ch7/hkpng.html#rate-limit and https://ftp.isc.org/isc/bind9/9.10.8-P1/doc/arm/Bv9ARM.pdf Page 119 Definition: Range allowed is 1 to very big number (actually 32 bit unsigned value, which is still a very big number). Default is not to apply qps-scaling.