--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-24T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5265649219 dns-udp-queries-received-ipv6: 742369097 dns-tcp-queries-received-ipv4: 208104880 dns-tcp-queries-received-ipv6: 33342438 dns-udp-responses-sent-ipv4: 5144133354 dns-udp-responses-sent-ipv6: 741509607 dns-tcp-responses-sent-ipv4: 205016098 dns-tcp-responses-sent-ipv6: 30789676