--- service: a.root-servers.net start-period: '2013-11-19T00:00:00Z' end-period: '2013-11-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1518368718 dns-udp-queries-received-ipv6: 89532489 dns-tcp-queries-received-ipv4: 7701674 dns-tcp-queries-received-ipv6: 1407885 dns-udp-responses-sent-ipv4: 1517264718 dns-udp-responses-sent-ipv6: 89539197 dns-tcp-responses-sent-ipv4: 8236818 dns-tcp-responses-sent-ipv6: 8592