If there are more that 5 NS record for a zone only perform a maximum of 4 address lookups for all the name servers. This limits the amount of remote lookup performed for server addresses at each level for a given query.
If there are more that 5 NS record for a zone only perform a maximum of 4 address lookups for all the name servers. This limits the amount of remote lookup performed for server addresses at each level for a given query.