--- service: i.root-servers.net start-period: '2015-10-12T00:00:00Z' end-period: '2015-10-13T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4283900834 dns-udp-queries-received-ipv6: 342877309 dns-tcp-queries-received-ipv4: 30356496 dns-tcp-queries-received-ipv6: 487756 dns-udp-responses-sent-ipv4: 4215535287 dns-udp-responses-sent-ipv6: 342876899 dns-tcp-responses-sent-ipv4: 30290007 dns-tcp-responses-sent-ipv6: 494817