--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-07T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5272194371 dns-udp-queries-received-ipv6: 996426511 dns-tcp-queries-received-ipv4: 554871710 dns-tcp-queries-received-ipv6: 130642964 dns-udp-responses-sent-ipv4: 4183713081 dns-udp-responses-sent-ipv6: 889743824 dns-tcp-responses-sent-ipv4: 428101464 dns-tcp-responses-sent-ipv6: 120111134