--- service: d.root-servers.net start-period: '2016-04-15T00:00:00Z' end-period: '2016-04-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4249475882 dns-udp-queries-received-ipv6: 627139357 dns-tcp-queries-received-ipv4: 31422035 dns-tcp-queries-received-ipv6: 597669 dns-udp-responses-sent-ipv4: 4231517191 dns-udp-responses-sent-ipv6: 626887676 dns-tcp-responses-sent-ipv4: 31403098 dns-tcp-responses-sent-ipv6: 597658