--- service: i.root-servers.net start-period: '2016-02-12T00:00:00Z' end-period: '2016-02-13T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4454955635 dns-udp-queries-received-ipv6: 393590063 dns-tcp-queries-received-ipv4: 17612972 dns-tcp-queries-received-ipv6: 906716 dns-udp-responses-sent-ipv4: 4430896207 dns-udp-responses-sent-ipv6: 395496443 dns-tcp-responses-sent-ipv4: 17667752 dns-tcp-responses-sent-ipv6: 909778