--- service: a.root-servers.net start-period: '2013-11-29T00:00:00Z' end-period: '2013-11-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1394786570 dns-udp-queries-received-ipv6: 73132363 dns-tcp-queries-received-ipv4: 7360723 dns-tcp-queries-received-ipv6: 1281604 dns-udp-responses-sent-ipv4: 1392333421 dns-udp-responses-sent-ipv6: 73130895 dns-tcp-responses-sent-ipv4: 7716258 dns-tcp-responses-sent-ipv6: 220