--- service: i.root-servers.net start-period: '2016-05-12T00:00:00Z' end-period: '2016-05-13T00:00:03Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5263438771 dns-udp-queries-received-ipv6: 428557242 dns-tcp-queries-received-ipv4: 31656732 dns-tcp-queries-received-ipv6: 931646 dns-udp-responses-sent-ipv4: 5216296716 dns-udp-responses-sent-ipv6: 435627760 dns-tcp-responses-sent-ipv4: 31194423 dns-tcp-responses-sent-ipv6: 936595