So when you kind wwwwwww dot something after which wwww dot some thing, the next query could effectively be answered with a really fast “no” (NXDOMAIN inside the DNS world). Aggressive adverse caching is effective only with DNSSEC signed zones, which includes the two the foundation and also a https://sergioseqak.blogripley.com/27093265/the-smart-trick-of-office-365-smtp-setup-that-no-one-is-discussing