> The point is, if you are the authority, you know how big the packet > is. If you know it ain't over 512, then you don't need TCP. > > Or are you saying you do? Wouldn't it be 'incredibly stupid' for > recursive servers to -require- TCP, even for < 512 byte packets?
A TCP query is just as valid as a UDP query. If you claim to provide DNS for a zone but fail to respond to valid queries, you are breaking your promise. It's not whether or not you need TCP. It's that if you promise to provide a service, you should in fact provide that service. DS
