--- service: a.root-servers.net start-period: '2016-01-15T00:00:00Z' end-period: '2016-01-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4935331291 dns-udp-queries-received-ipv6: 322525060 dns-tcp-queries-received-ipv4: 53966240 dns-tcp-queries-received-ipv6: 2068173 dns-udp-responses-sent-ipv4: 4931163396 dns-udp-responses-sent-ipv6: 322945725 dns-tcp-responses-sent-ipv4: 46358692 dns-tcp-responses-sent-ipv6: 283760