--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-01T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4502681972 dns-udp-queries-received-ipv6: 1042293322 dns-tcp-queries-received-ipv4: 523003009 dns-tcp-queries-received-ipv6: 160947969 dns-udp-responses-sent-ipv4: 3678727733 dns-udp-responses-sent-ipv6: 937185878 dns-tcp-responses-sent-ipv4: 437839533 dns-tcp-responses-sent-ipv6: 148215411