--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-09T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5009268534 dns-udp-queries-received-ipv6: 885319211 dns-tcp-queries-received-ipv4: 489585553 dns-tcp-queries-received-ipv6: 116727417 dns-udp-responses-sent-ipv4: 3988929735 dns-udp-responses-sent-ipv6: 800847097 dns-tcp-responses-sent-ipv4: 371440665 dns-tcp-responses-sent-ipv6: 106814587