--- version: rssac002v3 service: i.root-servers.net start-period: '2021-01-12T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5583599033 dns-udp-queries-received-ipv6: 1007151466 dns-tcp-queries-received-ipv4: 531264164 dns-tcp-queries-received-ipv6: 124685723 dns-udp-responses-sent-ipv4: 4445556029 dns-udp-responses-sent-ipv6: 902778327 dns-tcp-responses-sent-ipv4: 405952644 dns-tcp-responses-sent-ipv6: 116246012