The document is extremely acronym dense, which makes it hard to read for a non-expert reader. However, I do understand that this is nearly impossible to avoid in this area. That said, after reading this a couple of times, I think I understand enough of the topic matter to agree with the way it is presented. This document does not reference the DNS, and has no considerations that reflect on the DNS. A couple of nits, feel free to ignore: 1. 5.4.2. Fragmentation Parameters: Typo (I think): "... bigger than 304 bits using a 16 bits- Header_size". Should be "... 16 bit Header_size", in analogy with prior section. 2. 5.4.2. Fragmentation Parameters: Redundant line: "W 2 or 3 bits." 3. Both Appendix A and B has a redundant "Appendix" in the title that could be removed.