--- service: i.root-servers.net start-period: '2013-10-12T00:00:00Z' end-period: '2013-10-13T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2030590540 dns-udp-queries-received-ipv6: 112092854 dns-tcp-queries-received-ipv4: 4217298 dns-tcp-queries-received-ipv6: 138147 dns-udp-responses-sent-ipv4: 2116355880 dns-udp-responses-sent-ipv6: 119330422 dns-tcp-responses-sent-ipv4: 4242385 dns-tcp-responses-sent-ipv6: 151689