--- version: rssac002v3 service: i.root-servers.net start-period: '2018-12-13T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6021089632 dns-udp-queries-received-ipv6: 1063552501 dns-tcp-queries-received-ipv4: 131483369 dns-tcp-queries-received-ipv6: 29233646 dns-udp-responses-sent-ipv4: 5937190701 dns-udp-responses-sent-ipv6: 1068574802 dns-tcp-responses-sent-ipv4: 127428142 dns-tcp-responses-sent-ipv6: 28335048