--- service: d.root-servers.net start-period: '2016-04-18T00:00:00Z' end-period: '2016-04-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4186992283 dns-udp-queries-received-ipv6: 614264620 dns-tcp-queries-received-ipv4: 33102591 dns-tcp-queries-received-ipv6: 732044 dns-udp-responses-sent-ipv4: 4171177928 dns-udp-responses-sent-ipv6: 614003181 dns-tcp-responses-sent-ipv4: 33081388 dns-tcp-responses-sent-ipv6: 731019