--- service: a.root-servers.net start-period: '2015-06-12T00:00:00Z' end-period: '2015-06-12T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2735290182 dns-udp-queries-received-ipv6: 216957860 dns-tcp-queries-received-ipv4: 17003461 dns-tcp-queries-received-ipv6: 7970483 dns-udp-responses-sent-ipv4: 2760661623 dns-udp-responses-sent-ipv6: 219224300 dns-tcp-responses-sent-ipv4: 14648526 dns-tcp-responses-sent-ipv6: 6850353