I'm running two bind servers a activated query logging but don't know what exactly i see here and not finding anything on the web which enlightens me;
31-Oct-2017 17:56:35.464 queries: client x.x.x.x#55638: query: test.example.com IN A +
31-Oct-2017 17:56:35.464 queries: client x.x.x.x#55638: query: test.example.com IN A +
31-Oct-2017 16:34:07.505 queries: client x.x.x.x#2968: query: test.example.com IN A -ED
31-Oct-2017 16:45:23.316 queries: client x.x.x.x#36192: query: test.example.com IN A -EDC
31-Oct-2017 18:02:12.711 queries: client x.x.x.x#37001: query: test.example.com IN A +E
At the end of the lines A-, A+, -E, +E, -ED, -EDC is what i try to understand;