--- service: i.root-servers.net start-period: '2013-05-11T00:00:00Z' end-period: '2013-05-12T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1784479555 dns-udp-queries-received-ipv6: 93542096 dns-tcp-queries-received-ipv4: 2760134 dns-tcp-queries-received-ipv6: 114649 dns-udp-responses-sent-ipv4: 1795057824 dns-udp-responses-sent-ipv6: 100734895 dns-tcp-responses-sent-ipv4: 2929069 dns-tcp-responses-sent-ipv6: 115880