--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-19T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5937394409 dns-udp-queries-received-ipv6: 1566446889 dns-tcp-queries-received-ipv4: 573997687 dns-tcp-queries-received-ipv6: 71406907 dns-udp-responses-sent-ipv4: 5232167251 dns-udp-responses-sent-ipv6: 1471384347 dns-tcp-responses-sent-ipv4: 574733847 dns-tcp-responses-sent-ipv6: 56184009