--- service: a.root-servers.net start-period: '2015-04-03T00:00:00Z' end-period: '2015-04-03T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2682293915 dns-udp-queries-received-ipv6: 211270747 dns-tcp-queries-received-ipv4: 21012810 dns-tcp-queries-received-ipv6: 3009146 dns-udp-responses-sent-ipv4: 2685681627 dns-udp-responses-sent-ipv6: 210405628 dns-tcp-responses-sent-ipv4: 16785831 dns-tcp-responses-sent-ipv6: 1529458