--- service: d.root-servers.net start-period: '2015-12-16T00:00:00Z' end-period: '2015-12-16T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4313723565 dns-udp-queries-received-ipv6: 409068681 dns-tcp-queries-received-ipv4: 32463141 dns-tcp-queries-received-ipv6: 708755 dns-udp-responses-sent-ipv4: 4293915349 dns-udp-responses-sent-ipv6: 408736744 dns-tcp-responses-sent-ipv4: 32203234 dns-tcp-responses-sent-ipv6: 707996