--- version: rssac002v3 service: i.root-servers.net start-period: '2021-02-21T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4809260294 dns-udp-queries-received-ipv6: 923500574 dns-tcp-queries-received-ipv4: 474940034 dns-tcp-queries-received-ipv6: 119720903 dns-udp-responses-sent-ipv4: 3981161975 dns-udp-responses-sent-ipv6: 869943523 dns-tcp-responses-sent-ipv4: 367529408 dns-tcp-responses-sent-ipv6: 106307139