--- version: rssac002v3 service: i.root-servers.net start-period: '2021-05-18T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5844461606 dns-udp-queries-received-ipv6: 1032887360 dns-tcp-queries-received-ipv4: 463514248 dns-tcp-queries-received-ipv6: 120155425 dns-udp-responses-sent-ipv4: 4498434102 dns-udp-responses-sent-ipv6: 955478843 dns-tcp-responses-sent-ipv4: 372486515 dns-tcp-responses-sent-ipv6: 103551791