--- service: a.root-servers.net start-period: '2015-03-09T00:00:00Z' end-period: '2015-03-09T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2855411826 dns-udp-queries-received-ipv6: 230700958 dns-tcp-queries-received-ipv4: 19393698 dns-tcp-queries-received-ipv6: 2548519 dns-udp-responses-sent-ipv4: 2847310504 dns-udp-responses-sent-ipv6: 230427242 dns-tcp-responses-sent-ipv4: 17075915 dns-tcp-responses-sent-ipv6: 1426214