--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-04T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4524481272 dns-udp-queries-received-ipv6: 840640292 dns-tcp-queries-received-ipv4: 431099321 dns-tcp-queries-received-ipv6: 120826004 dns-udp-responses-sent-ipv4: 3800688798 dns-udp-responses-sent-ipv6: 780655946 dns-tcp-responses-sent-ipv4: 368600290 dns-tcp-responses-sent-ipv6: 115307636