--- version: rssac002v3 service: i.root-servers.net start-period: '2021-12-23T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6440508005 dns-udp-queries-received-ipv6: 1488653010 dns-tcp-queries-received-ipv4: 606777157 dns-tcp-queries-received-ipv6: 67622223 dns-udp-responses-sent-ipv4: 5668027293 dns-udp-responses-sent-ipv6: 1389047962 dns-tcp-responses-sent-ipv4: 586437094 dns-tcp-responses-sent-ipv6: 52466056