--- service: a.root-servers.net start-period: '2015-06-03T00:00:00Z' end-period: '2015-06-03T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2756392351 dns-udp-queries-received-ipv6: 244927344 dns-tcp-queries-received-ipv4: 17952949 dns-tcp-queries-received-ipv6: 2898680 dns-udp-responses-sent-ipv4: 2783470360 dns-udp-responses-sent-ipv6: 247280527 dns-tcp-responses-sent-ipv4: 16220174 dns-tcp-responses-sent-ipv6: 1377568