--- version: rssac002v3 service: i.root-servers.net start-period: '2019-02-20T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 7178568196 dns-udp-queries-received-ipv6: 1375450944 dns-tcp-queries-received-ipv4: 147032968 dns-tcp-queries-received-ipv6: 33802895 dns-udp-responses-sent-ipv4: 7057335900 dns-udp-responses-sent-ipv6: 1372646076 dns-tcp-responses-sent-ipv4: 140324562 dns-tcp-responses-sent-ipv6: 30772604