--- service: a.root-servers.net start-period: '2013-10-11T00:00:00Z' end-period: '2013-10-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1808119399 dns-udp-queries-received-ipv6: 92989391 dns-tcp-queries-received-ipv4: 8494419 dns-tcp-queries-received-ipv6: 1458072 dns-udp-responses-sent-ipv4: 1807529767 dns-udp-responses-sent-ipv6: 92917616 dns-tcp-responses-sent-ipv4: 8720178 dns-tcp-responses-sent-ipv6: 18005