--- version: rssac002v3 service: i.root-servers.net start-period: '2021-06-02T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5658726766 dns-udp-queries-received-ipv6: 1119013195 dns-tcp-queries-received-ipv4: 488362620 dns-tcp-queries-received-ipv6: 150387379 dns-udp-responses-sent-ipv4: 4805033931 dns-udp-responses-sent-ipv6: 961162112 dns-tcp-responses-sent-ipv4: 411777005 dns-tcp-responses-sent-ipv6: 105137974