[miki123211]

Not really that well. I know it's there, I know the rough shape, I know the order of the fields, but I don't know the spacing and alignment. I could count spaces by hand but that would be tedious. That's way, way better than the OP, where images are just indecipherable SVG blobs that the screenreader does not understand at all. The only thing I don't understand here are the numbers above the diagram, I don't know what they're for and it's not obvious for a SR user. I think I could understand it, though, especially that everything seems to be described below, with bit lengths and such. As far as I understand this RFC, you can get by without the diagram. What could help with it, though, would be a screen reader that has excellent braille display support (JAWS) and a good 80-cell braille display. I think that would let me see the spacing and understand it much better, but I don't have such fancy and expensive hardware at hand to test this out.