--- service: a.root-servers.net start-period: '2016-11-18T00:00:00Z' end-period: '2016-11-18T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4394403956 dns-udp-queries-received-ipv6: 429540561 dns-tcp-queries-received-ipv4: 170658603 dns-tcp-queries-received-ipv6: 8573354 dns-udp-responses-sent-ipv4: 4377825188 dns-udp-responses-sent-ipv6: 429319510 dns-tcp-responses-sent-ipv4: 171799529 dns-tcp-responses-sent-ipv6: 8600818