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Web Developer's Guide to DNS

rjzaworski.com

51–52 of 52 posts

Re: Web Developer's Guide to DNS

#51
post #3

A few issues: • The description is a bit vague, but the article seems to describe a model of a stack of resolvers, each resolver asking the next one in turn, the last resolver getting an answer, and the answer being then passed down the chain again. But this is not how it works. For a normal DNS query, there is ever only one resolver involved. This one resolver is the single thing asking many authoritative servers th…

Someone spends a shit ton of time explaining a new and complex concept. Top comment is someone else ripping it apart. Yep. Welcome to Hacker News. Can we please try to spend a week not using the following terms: A few things, a few issues, actually..., I agree but, or anything else that makes you feel superior by shitting on someone else

i'd say it is constructive criticise more than "ripping someone apart". yes constructive criticism can make you feel bad, it doesn't mean it was intended to be hurtful. is this a class that just isn't taught nowadays

Re: Web Developer's Guide to DNS

#52
post #38
post #22

Earlier quoted context omitted.

For the cloudflare case, I found this interesting: dig www.cloudflare.com ; > DiG 9.10.6 > www.cloudflare.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER > DiG 9.10.6 > cloudflare.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER Why does cloudflare.com resolve to a different IP address than www.cloudflare.com?

In a sort-of-related curio, IBM still keeps around their bunch of “www2.ibm.com” subdomains or something like that—likely because some links around the web are pointing to them. Afaict these addresses were used as ‘poor man's’ load balancing before multi-tier backends became the norm.

One amusing form of poor-man's load balancing was in the original Netscape 1, which had hard-coded rules for certain netscape web servers where it would automatically generate www1/www2/etc subdomains randomly
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