--- version: rssac002v3 service: a.root-servers.net start-period: '2019-02-02T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5073942645 dns-udp-queries-received-ipv6: 733051191 dns-tcp-queries-received-ipv4: 166610699 dns-tcp-queries-received-ipv6: 34306542 dns-udp-responses-sent-ipv4: 4965454363 dns-udp-responses-sent-ipv6: 732572469 dns-tcp-responses-sent-ipv4: 163103572 dns-tcp-responses-sent-ipv6: 34819076