--- service: i.root-servers.net start-period: '2014-12-29T00:00:00Z' end-period: '2014-12-30T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3176071093 dns-udp-queries-received-ipv6: 221991503 dns-tcp-queries-received-ipv4: 7157976 dns-tcp-queries-received-ipv6: 213526 dns-udp-responses-sent-ipv4: 3156279591 dns-udp-responses-sent-ipv6: 221948174 dns-tcp-responses-sent-ipv4: 7322784 dns-tcp-responses-sent-ipv6: 215846