--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-13T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6131399628 dns-udp-queries-received-ipv6: 1451052182 dns-tcp-queries-received-ipv4: 640093585 dns-tcp-queries-received-ipv6: 87183471 dns-udp-responses-sent-ipv4: 5364484968 dns-udp-responses-sent-ipv6: 1330580813 dns-tcp-responses-sent-ipv4: 612189944 dns-tcp-responses-sent-ipv6: 77601334