--- version: rssac002v3 service: a.root-servers.net start-period: '2019-01-31T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5691747986 dns-udp-queries-received-ipv6: 792206417 dns-tcp-queries-received-ipv4: 207146241 dns-tcp-queries-received-ipv6: 38419395 dns-udp-responses-sent-ipv4: 5568455884 dns-udp-responses-sent-ipv6: 791763002 dns-tcp-responses-sent-ipv4: 203861519 dns-tcp-responses-sent-ipv6: 36970378