--- version: rssac002v3 service: i.root-servers.net start-period: '2021-09-16T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5641980129 dns-udp-queries-received-ipv6: 1087930342 dns-tcp-queries-received-ipv4: 673187410 dns-tcp-queries-received-ipv6: 132817976 dns-udp-responses-sent-ipv4: 4796749957 dns-udp-responses-sent-ipv6: 941930403 dns-tcp-responses-sent-ipv4: 623473348 dns-tcp-responses-sent-ipv6: 115318183