--- service: i.root-servers.net start-period: '2015-02-16T00:00:00Z' end-period: '2015-02-17T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3299118760 dns-udp-queries-received-ipv6: 270030014 dns-tcp-queries-received-ipv4: 6699142 dns-tcp-queries-received-ipv6: 193646 dns-udp-responses-sent-ipv4: 3250225566 dns-udp-responses-sent-ipv6: 269958701 dns-tcp-responses-sent-ipv4: 6726442 dns-tcp-responses-sent-ipv6: 203487