Ted Lemon wrote:
Clearly it is not meaningless, or someone wouldn't have done it! :)
Simply wrong. Having running code is important to have
operational experiences on ideas to know whether they
are meaningful or not, with which, DNS was improved by
removing meaningless ideas such as inverse queries.
Similarly, IPv4 options are obsolete, allowing
512B DNS messages carryied over UDP with 8B
header over 576B IPv4 with not 60B but 20B
header.
But, the princile was forgotten resulting in
poor protocols like IPv6 not improved from the
original ones through operational experiences.
In this case, however, as the meaninglessness,
known from operational experiences on early
DNS, is already documented in 1035, you don't
have to reinvent a wheel such as IP options.
Masataka Ohta
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