--- service: d.root-servers.net start-period: '2016-04-28T00:00:00Z' end-period: '2016-04-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4768057073 dns-udp-queries-received-ipv6: 622152817 dns-tcp-queries-received-ipv4: 37744566 dns-tcp-queries-received-ipv6: 691668 dns-udp-responses-sent-ipv4: 4746432357 dns-udp-responses-sent-ipv6: 621920603 dns-tcp-responses-sent-ipv4: 37638275 dns-tcp-responses-sent-ipv6: 691390