--- service: a.root-servers.net start-period: '2015-03-29T00:00:00Z' end-period: '2015-03-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2470004888 dns-udp-queries-received-ipv6: 216867642 dns-tcp-queries-received-ipv4: 17432343 dns-tcp-queries-received-ipv6: 1970557 dns-udp-responses-sent-ipv4: 2477099808 dns-udp-responses-sent-ipv6: 216369113 dns-tcp-responses-sent-ipv4: 14453214 dns-tcp-responses-sent-ipv6: 1170977