--- version: rssac002v3 service: i.root-servers.net start-period: '2021-04-17T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4418683080 dns-udp-queries-received-ipv6: 829175947 dns-tcp-queries-received-ipv4: 407362279 dns-tcp-queries-received-ipv6: 115862184 dns-udp-responses-sent-ipv4: 3839214012 dns-udp-responses-sent-ipv6: 796287711 dns-tcp-responses-sent-ipv4: 360605223 dns-tcp-responses-sent-ipv6: 110949300