whether to return RRSIG RRs

I found words about RRSIG request in test code of BIND9: # Check direct query for RRSIG: If it's not cached with other records, # it should result in an empty response. It's a test case for a recursive server which is set to validate the response. Why shouldn't recursive server return RR

whether to return RRSIG RRs

I found words about RRSIG request in test code of BIND9: # Check direct query for RRSIG: If it's not cached with other records, # it should result in an empty response. It's a test case for a recursive server which is set to validate the response. Why shouldn't recursive server return RR