--- service: i.root-servers.net start-period: '2014-02-18T00:00:00Z' end-period: '2014-02-19T00:00:13Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2632464557 dns-udp-queries-received-ipv6: 171142664 dns-tcp-queries-received-ipv4: 5408498 dns-tcp-queries-received-ipv6: 288995 dns-udp-responses-sent-ipv4: 2573372761 dns-udp-responses-sent-ipv6: 171228203 dns-tcp-responses-sent-ipv4: 5454990 dns-tcp-responses-sent-ipv6: 289917