--- service: d.root-servers.net start-period: '2016-04-13T00:00:00Z' end-period: '2016-04-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4422876381 dns-udp-queries-received-ipv6: 643101013 dns-tcp-queries-received-ipv4: 32243266 dns-tcp-queries-received-ipv6: 609387 dns-udp-responses-sent-ipv4: 4405487626 dns-udp-responses-sent-ipv6: 642832053 dns-tcp-responses-sent-ipv4: 32212561 dns-tcp-responses-sent-ipv6: 609374