--- service: a.root-servers.net start-period: '2013-12-14T00:00:00Z' end-period: '2013-12-14T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1285733333 dns-udp-queries-received-ipv6: 58428489 dns-tcp-queries-received-ipv4: 6230927 dns-tcp-queries-received-ipv6: 1160443 dns-udp-responses-sent-ipv4: 1283803330 dns-udp-responses-sent-ipv6: 58438051 dns-tcp-responses-sent-ipv4: 6540801 dns-tcp-responses-sent-ipv6: 56