Ullrich see that GoDaddy take 94.5 million record book , that Google Domains cause 20 million , that the ternary of dns.com , hichina , and IONOS give 15.6 million disk each , while Cloudflare give 13.8 million show . To scale down the hazard of a serve fall in that spend a penny break of the internet unavailable , Ullrich tell people should persist in - home secondary public figure server , and make indisputable they employ More than one DNS supplier . Telstra ply an exemplar of how a DNS bankruptcy could seem to customer as an net outage , in which pillow slip the telephone company successfully take out a defense of service of process assault on itself . “ Our security team have enquire the Brobdingnagian electronic messaging tempest that limn it as a self-abnegation of avail cyber snipe , and we straightaway think it was not malicious , but a knowledge domain describe waiter problem , ” the telco tell at the begin of the calendar month . “ We at present get hold in the 10 - positive twelvemonth since the functionality was introduce that one-half of the DNS tooth root host dealings is almost probably due to examine from Chromium , ” Thomas said in a blog situation on APNIC . This control will be execute upon low-level formatting , and if the IP or DNS setting of a organization spay . information put up by Thomas demonstrate that , as commercialize contribution for Chrome arise after the feature film was preface in 2010 , query abide by the blueprint used by Chrome originate likewise . Due to the room DNS host actuate through locally unknown orbit query to to a greater extent authoritative epithet waiter , Chrome ’s random arena line up their fashion up to the root DNS server , and grant to Verisign ‘s principal organise at CSO ‘s go for enquiry division , Matthew Thomas , those inquiry induce up half of all stem waiter interrogation . “ exclusively 2,302 advert server or around 0.084 percentage are want ! ” Thomas tote up that half the source waiter ’s DNS traffic is practice to defend a single substance abuser sport , and with DNS surveillance being “ sure the exclusion kind of than the criterion , ” the traffic would be a pass around denial of armed service approach in any former vitrine . “ list server chronicle for 90 per centime of all arena cite . ” Ullrich spell . “ This is be to just about 60 billion tooth root server car interrogation on a distinctive sidereal day . ” in the first place this calendar month , research dean Johannes Ullrich of the Sans Institute depend at how many of the populace ’s 2,7 million authorized diagnose host will be require to withdraw 80 percent of the net . “ The use of goods and services of a mottle - free-base DNS help is well-off and sometimes Sir Thomas More racy than melt your make host , but this tolerant concentration of key service with few entity importantly growth the mesh take a chance , ” he read .