Franck Martin writes: > The IETF ones... > > not supporting ECN But ECN has not always been a standard. If all RFCs had been simultaneously written forty years ago, it would be reasonable to speak of one organization or another not respecting standards because it did not adhere to a given RFC. But in the real world, RFCs have been written over time, and whether or not an entity is conformant cannot be determined without a reference to time. Publishing a new standard does not automatically make the entire planet non-conformant. I suspect that ISOC's site is conformant up to a certain point, but not beyond ... like most sites on the Internet. The wise developer allows for the impossibility of instantaneous updates in the development and implementation of new standards.