--- service: i.root-servers.net start-period: '2013-12-25T00:00:00Z' end-period: '2013-12-26T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2047196849 dns-udp-queries-received-ipv6: 127995281 dns-tcp-queries-received-ipv4: 4434762 dns-tcp-queries-received-ipv6: 242468 dns-udp-responses-sent-ipv4: 1999226678 dns-udp-responses-sent-ipv6: 128123244 dns-tcp-responses-sent-ipv4: 4456833 dns-tcp-responses-sent-ipv6: 245859