--- service: a.root-servers.net start-period: '2013-12-08T00:00:00Z' end-period: '2013-12-08T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1396118371 dns-udp-queries-received-ipv6: 64910184 dns-tcp-queries-received-ipv4: 6735745 dns-tcp-queries-received-ipv6: 1295520 dns-udp-responses-sent-ipv4: 1392885173 dns-udp-responses-sent-ipv6: 64917248 dns-tcp-responses-sent-ipv4: 7279214 dns-tcp-responses-sent-ipv6: 154