c 
Smashing Magazine
AUGUST 22, 2021
However, TCP is typically implemented in the operating system’s (OS’) kernel, a secure and more restricted environment, which for most OSes isn’t even open source. Let’s contemplate what would happen if A, B, and C were all render-blocking resources. As such, one best practice or optimization can end up undoing another.
Smashing Magazine
SEPTEMBER 6, 2021
You would, however, be hard-pressed even today to find a good article that details the nuanced best practices. This is because, as I stated in the introduction to part 1 , much of the early HTTP/2 content was overly optimistic about how well it would work in practice, and some of it, quite frankly, had major mistakes and bad advice.
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