--- service: a.root-servers.net start-period: '2013-12-03T00:00:00Z' end-period: '2013-12-03T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1496410513 dns-udp-queries-received-ipv6: 76842558 dns-tcp-queries-received-ipv4: 7941204 dns-tcp-queries-received-ipv6: 1272295 dns-udp-responses-sent-ipv4: 1495192794 dns-udp-responses-sent-ipv6: 76852987 dns-tcp-responses-sent-ipv4: 8271642 dns-tcp-responses-sent-ipv6: 168